Clean and dry the glass jar by boiling (ideal), or washing with hot soapy water.
Select the freshest ingredients available, as this can affect the success of fermentation.
Weigh all of the fresh produce in grams and make a note of the total.
Measure out 2-3% of the total weight of the produce in salt. For example, in this recipe, we need 12 grams of kosher salt for the ~460 grams of peppers, carrots, onions, and garlic.
Rough chop the produce and add it to a food processor. Sprinkle the salt over the top.
Blend the ingredients until they reach a finely chopped texture.
Add the mash to the prepared glass jar, pressing it down to release all air pockets as you go. Any air left is a vulnerability for mold.
Cover the mash with a cartouche (a piece of parchment cut to the size of the surface), pressing it into the surface to protect the top from air exposure.
Cover the jars with an airlock lid and ferment for 3-4 weeks at room temperature (ideally between 65-70°F).