Rinse and dry the roma tomatoes and Serrano pepper, being sure not to use any cleanser. We want the naturally occurring bacteria to be present for fermentation.
Dice 4-5 roma tomatoes and 1 white onion.
Place into a large bowl with room to mix.
Mince 3 cloves fermented garlic and 1 Serrano pepper and add to bowl.
Squeeze juice from one lime over the salsa.
Sprinkle 1 teaspoon of salt over the salsa and stir.
Taste with a clean spoon. The salsa should taste a little salty, but not overly salty. If it does not, add another teaspoon of salt.
Stir thoroughly and allow it to sit for about 5 minutes so that the salt will pull water from the vegetables to create a brine.
Using a wide-mouth quart mason jar and a wide-mouth funnel, spoon salsa into the jar.
With fermentation tamper, push the salsa down to pack and push the brine over the salsa
Add remaining salsa and pack down as you go
Once all of the salsa is in the jar, press down with the tamping tool one more time and add your fermenting weight on top. If any vegetables float up past the weight, scoop them up and discard them so that they don’t potentially mold.
If the brine doesn’t go over all the salsa, you can add a little filtered water, either bottled or from the refrigerator. You do not want to use chlorinated tap water because the chlorine can inhibit the growth of the good bacteria.
Add your regular or fermenting lid.
I prefer a fermenting lid because you don’t have to worry about burping the jar and disturbing the weight. The lid lets out the carbon dioxide through the valve on top.
Place the jar in a dark place for 2-3 days
The next day, there shouldn’t be any visible changes unless you’re in a very warm environment.
On the second day, check for tiny bubbles forming in the brine. Taste the salsa. If it tastes good to you, you can eat it.
On day three, you should see more bubbles. Taste the salsa. It should have a more fermented tang and a slight alcoholic smell.
Once it is done fermenting to your taste, pour the amount you want to eat into a bowl
Add ½ to 1 cup cilantro
Stir and taste for seasoning then enjoy!
Replace fermenting lid with regular lid and refrigerate.