Recently, we have been picking several pounds of heirloom tomatoes from our garden. Many have accumulated in the kitchen. In an effort to use them before they spoil, we decided to make fermented salsa. Inspired from a Nourishing Traditions recipe and The Art of Fermentation, I made several jars worth or about 6 cups.
To start with, have several clean jars and lids on hand (they should all be washed with hot water prior to using them). Next gather all you ingredients.
Ingredients include:
- 6 ripe large tomatoes that have been skinned, seeded and diced
- 1 medium diced onion
- 5 to 6 diced jalapeno peppers
- the juice of 2 lemons
- 1 bunch of cilantro diced (stems removed)
- 1 teaspoon of sea salt
- 1 teaspoon of minced oregano
- 6 tablespoons of whey
- 6 to 8 minced garlic cloves
A note on making whey: Leave a cup of raw milk at room temperature for 1 to 4 days until milk solids separate from the semi-clear liquid (aka. whey). Separate the whey from the milk solid by pouring the mixture through a cheese cloth.
I started by preparing the tomatoes. To skin them, place one at a time in filtered boiling water for 5 seconds or so. You’ll see that the skin is bunching up. Then remove and peel the skin off the rest of the way. After skinning the tomatoes, I cut each perpendicular to the core and scoop out the seeds with my finger. After removing seeds, I then diced them. I used a combination of Yellow Boy and Purple Cherokee tomatoes. I suggest using your favorite ones. I added the tomatoes to a large bowl.
Next, I cut the lemons in half and squeezed their juice into the bowl. Be careful not to get lemon seeds into your mix.
I then added the rest of the ingredients to the bowl and folded the mixture with my hands. You may want gloves for this process since the jalapeno can sting. Also, you may not want to use all the jalapeno seeds if you want a milder salsa. We like it hot, so we added the seeds of 4 of the 6 jalapenos.
We put the mixture into the jars and closed the lids tight. We put them on our window sill for five days so that the fermentation process could start. This morning, I open the jars to see how they looked. Mold was on the surface of the salsa for 3 of the 4 jars. This is normal since the oxygen present at the top of the mix and the warmth of the room promotes mold to grow. I scooped this off with a spoon and put them in the refrigerator.
I did taste the salsa from one of the jars. It may be the best salsa I have ever had! It is spicy hot and has a great tomato flavor. The other ingredients are more subtle but blend well to give the classic fresh salsa taste.
Give this recipe a try and let us know what you think.


I love this salsa! It’s great to have “fresh” salsa in the fridge that you made 3 or 4 months ago and with the added nutritional benefit of being lacto-fermented it’s fabulous for you. Tip: try sprinkling a put of salt on the top when fermenting to reduce the mold growing on the top. That’s how I keep my lacto-fermented ketchup from molding, making it last much longer.
Great tips- Thank you Pam!
It tastes so good that I ended up eating one of the jars of salsa tonight.
Stupid question — what about putting a small piece of plastic wrap on top to block out the air somewhat to reduce mold — or is the small amount of air required to allow the fermenting to do its work? Just a thought.. that is what I do with home-made guacamole to keep the color from turning brown if it’s stored in the fridge..
That may work. I guess the only question is if toxins from the plastic can diffuse into the food.
Pam says the salt trick works well.
I have some fresh, store bought salsa that I forgot about in the frig. After a couple of weeks, the lid was bulging. I removed the lid and it appears to have started fermenting (bubbles rising). Is this the same kind of fermentation? I tasted it. It has a sting to it on my tongue, otherwise it seemed useable for something anyway. Not sure whether to throw it out or use it.
Any thoughts.
Thanks,
Dennis
I have had a similar experience prior to fermenting. My guess is that it is probably OK to eat.
Often, if foods haven’t been ultra-pasteurized…they have some potential to ferment on their own. We often prefer to start fermentation from unpasteurized ingredients to maximize the pro-biotic content.