By Heidi Moretti, MS, RD, CLT | Registered Dietitian & Certified LEAP Therapist, 25+ years clinical experience
Why I Still Can Salsa After 20 Years — A Personal Note
I grew up watching my mother preserve summer produce, and that ritual stuck with me. When I was deep in my clinical training as a registered dietitian, I started asking: what actually happens to nutrients when you cook and preserve food? What I found changed how I think about “fresh vs. processed” entirely. With tomatoes, the science favors preserved products in some surprisingly important ways. I made this exact recipe in my Missoula kitchen for many summers in a row — tweaking the spice ratios, experimenting with heirloom varieties from our farmer’s market, and once — memorably — accidentally leaving out the citric acid entirely (don’t do that). Honestly, I haven’t made a batch in a couple of years. With the kids out of the house, a full canning run felt like overkill. But I’m planning a small batch this summer and I can’t wait — some recipes just deserve to come back.
— Heidi Moretti, MS, RD, CLT | The Healthy RD
If you want to keep summer around all year, making homemade salsa for canning is one of the smartest kitchen projects you can take on. Fresh salsa is wonderful, but it lasts only a few days. This water-bath canning recipe keeps beautifully for up to 18 months on your pantry shelf — no weird additives, no BPA-lined cans, no plastic packaging.
Beyond the convenience, there are genuine nutritional reasons to love a good canned tomato salsa. I’ll get into the research below, but the short version: cooking tomatoes dramatically increases the bioavailability of lycopene, one of the most powerful antioxidant carotenoids in the food supply.
Beyond salsa, I’ve also shared a full collection of salsa canning and fresh salsa recipes including a salsa verde and an Instant Pot version — check those out when you’re ready to expand your preserving repertoire. And if you love canning as much as I do, my healthy canning applesauce recipe walks you through the same equipment setup beautifully.
25 Ways to Use Your Canned Salsa
This isn’t just a chip dip (though it’s incredible as one). Here’s how I actually use mine throughout the year:
- Stir into your next batch of chili or soups
- Dip with grain-free tortilla chips
- Slow cooker chicken — pour a jar over chicken thighs for 6 hours
- Quick taco soup base
- Blend with sour cream or Greek yogurt for a party dip
- Tacos, burritos, and burrito bowls
- Sheet-pan nachos
- Huevos rancheros
- Fish taco topping
- Shakshuka base (poach eggs right in it)
- Mix into scrambled eggs
- Pasta sauce in a pinch
- Marinade for grilled meats
- Brush on salmon before baking
- Stir into rice or quinoa while cooking
- Add to black bean soup
- Top a baked potato
- Mix into guacamole
- Use as enchilada sauce
- Layer into a taco casserole
- Braise short ribs or brisket
- Mix into ground meat for flavorful meatballs
- Stir into gazpacho
- Use as a pizza sauce
- Add to a Bloody Mary — yes, really
The Nutrition Science Behind This Salsa Recipe
As a registered dietitian, I can tell you that one of the biggest nutrition myths I still encounter is that cooked vegetables are nutritionally inferior to raw ones. For tomatoes, the opposite is often true.
New Research: Why Canned Tomato Salsa May Be Healthier Than Fresh
Here’s what the most current evidence says about the nutrients in this recipe:
Lycopene: The Star of the Show
Lycopene is the red carotenoid pigment in tomatoes, and it’s one of the most studied antioxidants in nutrition research. What makes it particularly interesting from a dietitian’s perspective is that its bioavailability increases dramatically with heat processing. Cooking tomatoes — as you do in this salsa recipe — actually breaks down the plant cell walls that otherwise limit absorption.
A 2024 review published in the Journal of Nutrition and Metabolism confirmed that lycopene mitigates oxidative stress-related conditions including inflammation, obesity, and diabetes, while showing protective effects on the heart, kidneys, liver, and nervous system. And a 2025 umbrella review in Food & Function analyzed data from multiple meta-analyses and found that tomato-derived lycopene was associated with improvements in cardiovascular risk markers including LDL cholesterol and blood pressure in people with cardiometabolic conditions.
There’s also emerging cancer-protective data. A February 2025 dose-response meta-analysis in Frontiers in Nutrition reviewed prospective cohort studies on tomato and lycopene intake and cancer risk across multiple tumor types. And a 2024 review in Molecules specifically highlighted that tomato peel — which my recipe retains, unlike many recipes that require blanching and skinning — is one of the richest sources of lycopene and carotenoids in the entire tomato.
This is exactly why I am stubborn about leaving the tomato skins on. Every recipe I’ve ever seen recommends scalding and peeling tomatoes before canning, and I’ve always pushed back on that. The skin is where much of the fiber, lycopene, and antioxidant content concentrates. My clients have never noticed — and now the science backs me up even more firmly than I expected.
— Heidi Moretti, MS, RD, CLT
Capsaicin from Jalapeños: Not Just Heat
The capsaicin in the jalapeños of this recipe is doing real metabolic work. A 2024 study published in PeerJ found that pepper consumption from Capsicum species noticeably shifted gut bacteriome composition in healthy volunteers, and prior research in Frontiers in Microbiology demonstrated that capsaicin can prevent microbial dysbiosis and gut barrier dysfunction — mechanisms that are increasingly linked to obesity, metabolic syndrome, and systemic inflammation. This is an area I follow closely in my functional nutrition practice, especially given how profoundly the gut microbiome affects so many of my clients’ symptoms.
Speaking of gut health — if you’re dealing with food sensitivities that make you question which ingredients work for your body, my detailed guide on MRT food sensitivity testing explains the gold-standard method I use clinically to help people identify their personal reactive foods. You might be surprised which “healthy” foods are actually causing your symptoms.
Cumin and Coriander: Ancient Spices, Modern Evidence
I use whole toasted cumin and coriander seeds in this recipe — not ground — because the aromatic terpenes are preserved much better this way. Both spices have well-documented antimicrobial properties (which actually contribute to the safety of fermented and preserved foods), and cumin in particular has been studied for its effects on blood sugar regulation and digestive enzyme activity. Toasting activates the volatile oils. It’s a small step that makes a significant flavor and nutritional difference.
Lycopene Content: Fresh vs. Cooked/Canned Tomatoes
| Tomato Form | Lycopene (approx.) | Bioavailability |
|---|---|---|
| Raw fresh tomato | ~2.5–3 mg / 100g | Lower (bound in cell walls) |
| Cooked tomato sauce | ~7–10 mg / 100g | Higher (heat breaks cell walls) |
| Canned tomato products | ~9–12 mg / 100g | High — lycopene is heat stable |
| This salsa recipe (est.) | ~5–8 mg per serving | High (cooked + preserved) |
Estimates based on published food composition data. Actual values vary by tomato variety and ripeness.
Equipment You Need for Water Bath Canning
I recently reviewed my canning equipment setup in my post about canning applesauce. If you’re new to home canning, you’ll need a few essentials. The initial investment stings a little, but every year after, it’s virtually free — and you’ll have shelf-stable, additive-free food you made yourself.
Getting the pH Right: The Non-Negotiable Safety Step
This is the single most important section of this entire post. The reason we add acid to canned salsa isn’t about taste — it’s about preventing Clostridium botulinum, the bacteria responsible for botulism. Water-bath canning (as opposed to pressure canning) relies on acidity to keep foods safe at room temperature. Tomatoes alone are not reliably acidic enough — the pH can vary significantly depending on variety and growing conditions, which is why USDA-tested recipes always include an acid addition.
I use citric acid as my acid of choice for one very practical reason: it doesn’t add extra liquid to the salsa. Vinegar-heavy recipes produce a thinner, more watery product, and large amounts of vinegar can overwhelm the fresh tomato flavor. With citric acid, you get all the pH safety without the trade-off.
If a recipe calls for 1 cup of vinegar, you can substitute 2.5 tablespoons of citric acid. I am obsessively cautious about canning safety — 20+ years in and I’ve never had a failed jar. Here’s my honest tip: you can never be too cautious with acid levels in water bath canning.
Important Notes for the Best Homemade Canning Salsa
After years of making this recipe — and years of eating mediocre canned salsa from other recipes — I’ve landed on a few non-negotiable principles:
Leave the Tomato Skins On (Please)
Most recipes tell you to blanch, peel, and discard the tomato skins. I don’t do this, and I have strong opinions about why. The skin is where a disproportionate amount of the fiber, lycopene, and antioxidant polyphenols concentrate. Removing it is literally throwing nutrition in the trash. As I mentioned in the research section above, a 2024 review in Molecules specifically called tomato peel “a rich source of lycopene.” My clients have never noticed the skins, and I’ve never had a texture complaint in 20 years of making this recipe.
Don’t Skip Toasting the Spices
Whole cumin and coriander seeds, dry-toasted in a pan before grinding, are what separate this recipe from every bland canned salsa you’ve ever had. The Maillard reaction that happens during toasting creates hundreds of new aromatic compounds that you simply cannot replicate with pre-ground spices. Two to three minutes over medium heat, watching carefully, is all it takes.
Heirloom Tomatoes Over Romas (Usually)
Roma tomatoes have their place — they’re meatier and produce a thicker, chunkier salsa. But I almost always reach for heirloom varieties when I can get them at our Missoula farmer’s market. The flavor complexity is simply unmatched. If texture is your priority, use Romas. If flavor is, use heirlooms. When I can’t find either, any ripe garden tomato works.
Adjust Heat to Your Tolerance
The jalapeno seeds and membrane contain the highest concentration of capsaicin. Remove both for a genuinely mild salsa. Keep the seeds for medium. Add cayenne or dried chipotle for hot. This recipe is written as mild, with easy adjustments to take it wherever you want. My personal preference is medium — seeds out, but a teaspoon of smoked paprika stirred in at the end.
Step-by-Step: How to Can Salsa at Home
Tasty Canning Salsa Recipe
Equipment
- Water bath canner
- Jar funnel
- 8 quart or larger stock pot
- Jar Grabber
- Food processor
- Ladles and spoons
- Ball pint jars, lids, and rims
- Cutting board and knife
Ingredients
- 2 lb sweet onions
- 6 lb tomatoes preferably heirloom
- 2 lb bell peppers can use Anaheim or poblano
- 6 jalapenos
- 1/4 cup Bottled lime juice
- 3 cloves garlic
- 2 tbsp whole coriander
- 2 tbsp whole cumin seed
- 4 tsp citric acid
- 1 tbsp Himalayan salt
- 6 oz tomato paste
Instructions
Prepare for canning:
- Wash all jars and lids thoroughly with soap and water and rinse well. Place the jars on a baking sheet and keep them in a preheated oven that is set at 225 degrees F. Have fresh, new lids handy for the canning process. As long as they are clean, you do not need to heat them. You can re-use rims from prior canning.Add water to your water bath canner and bring to a boil. You can prepare the vegetables during this step. Once the canner is at a boil, you can reduce heat until you are ready to process the jars. Toast the spices: Place the coriander and cumin in a pan on moderate heat. Toast them until they are fragrant, being mindful not to burn. This will take 2-3 minutes.
Prepare for canning:
- Wash all jars and lids thoroughly with soap and water and rinse well. Place the jars on a baking sheet and keep them in a preheated oven that is set at 225 degrees F. Have fresh, new lids handy for the canning process. As long as they are clean, you do not need to heat them. You can re-use rims from prior canning.Add water to your water bath canner and bring to a boil. You can prepare the vegetables during this step. Once the canner is at a boil, you can reduce heat until you are ready to process the jars. Toast the spices: Place the coriander and cumin in a pan on moderate heat. Toast them until they are fragrant, being mindful not to burn. This will take 2-3 minutes.
Prepare the vegetables:
- Wash all vegetables. Wearing latex or plastic gloves, cut jalapenos in half and remove the seeds, if desired. The seeds are the hottest part of the pepper, so be mindful of your personal tastes. Cut the onions, bell peppers, and tomatoes in quarters. Peel the garlic, cut in quarters, or mince if you don't like garlic pieces.Add all of the vegetables into the food processor in about 4 different batches. Pulse the food processor until the ingredients are at your desired consistency, small to moderate chopped pieces are great.
Cook the salsa:
- Place all of the vegetables, salt, tomato paste, citric acid, and spices into your large stock pot. Season with salt and spices to your preferences. Bring the mixture to a boil, then reduce the heat and simmer on a low boil for 20-30 minutes.Fill and close the jars: Set the jars next to the salsa in the saucepan. Use a ladle to pour the salsa into the jars through a canning funnel, leaving about 1/2-inch head space at the top. Dislodge any trapped air by running a wooden spoon through each jar. Wipe the rims of the jars with a clean paper towel. Place the lids on, and screw on the rings securely but not extremely tight.
Seal the jars:
- Make sure your water is at a boil in the water canner. Next, using canning tongs, gently transfer the jars to the canner until all the jars are in place. If you can't fit them all, don't worry. You can set them aside and process them after the first batch. You will want the water to cover the tops of the jars. If you need more, add boiling water until the jars are completely covered. Bring the water to a full rolling boil, and process for 20 minutes for pint jars. For quart jars, bump that up to 25 minutes. If you are at sea level, pint jars can process in as little as 15 minutes.
Remove and cool:
- Using canning tongs, gently remove the jars from the canner and transfer them to a kitchen towel or cooling rack, again keeping them vertical. Do not set hot jars directly on to cool counter surfaces. Leave to cool, undisturbed, for at least 12 hours. If any of the jars do not seal when cool, reprocess using the method above, or refrigerate and use immediately.
Store:
- You should make a label on the lid with the date of processing. After 24 hours, inspect all jars to make sure they all have a vacuum seal. Loosen or remove the rings and store jars in a cool, dark place. The sealed jars will last for up to 18 months
Notes
Nutrition
Tasty Canning Salsa Recipe
Equipment
- Water bath canner
- Jar funnel
- 8 quart or larger stock pot
- Jar Grabber
- Food processor
- Ladles and spoons
- Ball pint jars, lids, and rims
- Cutting board and knife
Ingredients
- 2 lb sweet onions
- 6 lb tomatoes preferably heirloom
- 2 lb bell peppers can use Anaheim or poblano
- 6 jalapenos
- 1/4 cup Bottled lime juice
- 3 cloves garlic
- 2 tbsp whole coriander
- 2 tbsp whole cumin seed
- 4 tsp citric acid
- 1 tbsp Himalayan salt
- 6 oz tomato paste
Instructions
Prepare for canning:
- Wash all jars and lids thoroughly with soap and water and rinse well. Place the jars on a baking sheet and keep them in a preheated oven that is set at 225 degrees F. Have fresh, new lids handy for the canning process. As long as they are clean, you do not need to heat them. You can re-use rims from prior canning.Add water to your water bath canner and bring to a boil. You can prepare the vegetables during this step. Once the canner is at a boil, you can reduce heat until you are ready to process the jars. Toast the spices: Place the coriander and cumin in a pan on moderate heat. Toast them until they are fragrant, being mindful not to burn. This will take 2-3 minutes.
Prepare for canning:
- Wash all jars and lids thoroughly with soap and water and rinse well. Place the jars on a baking sheet and keep them in a preheated oven that is set at 225 degrees F. Have fresh, new lids handy for the canning process. As long as they are clean, you do not need to heat them. You can re-use rims from prior canning.Add water to your water bath canner and bring to a boil. You can prepare the vegetables during this step. Once the canner is at a boil, you can reduce heat until you are ready to process the jars. Toast the spices: Place the coriander and cumin in a pan on moderate heat. Toast them until they are fragrant, being mindful not to burn. This will take 2-3 minutes.
Prepare the vegetables:
- Wash all vegetables. Wearing latex or plastic gloves, cut jalapenos in half and remove the seeds, if desired. The seeds are the hottest part of the pepper, so be mindful of your personal tastes. Cut the onions, bell peppers, and tomatoes in quarters. Peel the garlic, cut in quarters, or mince if you don't like garlic pieces.Add all of the vegetables into the food processor in about 4 different batches. Pulse the food processor until the ingredients are at your desired consistency, small to moderate chopped pieces are great.
Cook the salsa:
- Place all of the vegetables, salt, tomato paste, citric acid, and spices into your large stock pot. Season with salt and spices to your preferences. Bring the mixture to a boil, then reduce the heat and simmer on a low boil for 20-30 minutes.Fill and close the jars: Set the jars next to the salsa in the saucepan. Use a ladle to pour the salsa into the jars through a canning funnel, leaving about 1/2-inch head space at the top. Dislodge any trapped air by running a wooden spoon through each jar. Wipe the rims of the jars with a clean paper towel. Place the lids on, and screw on the rings securely but not extremely tight.
Seal the jars:
- Make sure your water is at a boil in the water canner. Next, using canning tongs, gently transfer the jars to the canner until all the jars are in place. If you can't fit them all, don't worry. You can set them aside and process them after the first batch. You will want the water to cover the tops of the jars. If you need more, add boiling water until the jars are completely covered. Bring the water to a full rolling boil, and process for 20 minutes for pint jars. For quart jars, bump that up to 25 minutes. If you are at sea level, pint jars can process in as little as 15 minutes.
Remove and cool:
- Using canning tongs, gently remove the jars from the canner and transfer them to a kitchen towel or cooling rack, again keeping them vertical. Do not set hot jars directly on to cool counter surfaces. Leave to cool, undisturbed, for at least 12 hours. If any of the jars do not seal when cool, reprocess using the method above, or refrigerate and use immediately.
Store:
- You should make a label on the lid with the date of processing. After 24 hours, inspect all jars to make sure they all have a vacuum seal. Loosen or remove the rings and store jars in a cool, dark place. The sealed jars will last for up to 18 months
Notes
Nutrition
Salsa Variations and Substitutions
- Leave jalapeño seeds in
- Add ½ tsp cayenne pepper
- Stir in 1–2 chipotles in adobo after cooking
- Swap in a habanero or serrano pepper
- Use Anaheim or poblano instead of bell pepper for smokier depth
- Sub in Southwest spice blend for the cumin and coriander
- Add roasted garlic for deeper flavor
- Use Ball Fiesta Salsa Mix or Mrs. Wages All Natural Classic Salsa Mix if you prefer a pre-made spice packet
A Note on Food Sensitivities and Tomatoes
Tomatoes, peppers, and onions are all relatively common food reactivity triggers for some people — particularly in the context of MRT food sensitivity testing and elimination protocols. Nightshades (tomatoes, peppers, eggplant) are also sometimes flagged in nightshade-free dietary approaches. If you react to this salsa and aren’t sure why, that’s exactly the kind of mystery that functional nutrition testing can help solve. I’ve worked with clients who assumed they couldn’t tolerate tomatoes at all, only to discover they were reacting to a specific processing chemical — not tomatoes themselves. My guide on nightshade-free spice blends might also interest you if you’re navigating that territory.
More From The Healthy RD
Frequently Asked Questions About Canning Salsa
Heidi Moretti, MS, RD, CLT
Registered Dietitian | Certified LEAP Therapist | 25+ Years Clinical Experience
Heidi is the founder of The Healthy RD and author of Cortisol Fix, Gut Fix, Period Fix, and The Whole Body Guide to Gut Health. She specializes in functional nutrition, gut health, and food sensitivity testing using the MRT/LEAP protocol. See full bio →
I literally survive on this in the winter. So good!
Yummy!
Wow! Great recipe. Thank you Heidi
Looks great. Can’t wait to try it. Heidi’s recipes are always excellent.
That much lemon juice scares me! I understand the flavor will cook out some. We choose to not use vinegar but citric acid seems to be in short supply right now. What if I use half vinegar and hald lemon juice?
Hi Sheri! This recipe tastes less acidic than others, but you could certainly try half vinegar and half lemon juice. The issue I’ve run into with that is that it becomes more runny. But you technically can do that.
Is the 6 pounds of tomatoes final cut or whole tomatoes?
Whole tomatoes.
how many pints does this recipe make?
About 9 pints. Thanks for checking out my recipe!
How many pints does this make?
About 9 pints:)
This is the first salsa recipe I’ve seen that adds tomato paste! Is this added to thicken up the salsa? I’d like to have a little liquid, but a thick salsa is what I’m after, and I’m hoping that’s the answer to using tomato paste!
Hi! Yes, the tomato paste thickens it. Hope it works well for you:)
Do you know about how many tomatoes 6lbs is..? If using whole grown tomatoes not Roma
Great question! It will vary depending on the size of your tomato, each one averages around 5 oz if it’s medium-sized, so 6 lbs would be approximately 14 medium tomatoes. Hope that helps!
This is the first place I saw info about using citric acid instead of vinegar. I can’t seem to find a safe salsa recipe using a little citric and lime juice; not vinegar, and then pressure canning. Are their guidelines to reduce acid (lemon/lime/citric) for better flavor, and then pressure can it?
Great question! Yes, there are guidelines as outlined here: https://nchfp.uga.edu/how/can_03/tomato_intro.html#:~:text=Acid%20can%20be%20added%20directly,may%20cause%20undesirable%20flavor%20changes. I used lime juice just for flavor in this recipe. Good luck!
Do you add the citric acid to the sauce or the jar before adding sauce?
Hi Arleen, thanks for your question! I add it to the sauce when the spices are added. I just added that comment to the recipe to make it more clear.
Best regards,
Heidi