01 -
Slice the stems from the jalapeno peppers and add them to a medium-sized pot along with the chopped onion.
02 -
Cover with water and bring to a quick boil. Reduce the heat and simmer for about 15 minutes, or until the jalapeno peppers soften. They will turn dull green and can be easily pierced with a fork, but do not let them become mushy.
03 -
Strain the boiled jalapenos and onion, but keep the liquid on hand for later use.
04 -
Add the boiled jalapenos, onion, garlic, oil, and salt to a food processor. Process until very smooth and creamy, about 4-5 minutes.
05 -
If you’d like a thinner sauce, add in a few tablespoons of the reserved boiling water.
06 -
Adjust for salt as needed. Serve immediately or store in a sealed container in the refrigerator.