I used 2 small, fresh jalapenos because the smaller ones tend to be less hot.
Feel free to use a big one instead, and leave as much of the seeds and ribs in as you're comfortable with!
4 cups thai basil leaves, loosely packed
4 cloves garlic
1/4 cup roasted peanuts
2 small jalapenos, seeds and ribs removed, chopped
1/2 cup sunflower oil
zest of one lemon, removed with a microplane (about 1 T)
2 T lemon juice
1 tablespoon fish sauce
1 t black pepper
1/2 t kosher salt
Blitz everything in a food processor.
The Johnson Family Cookbook