1 small red onion, minced
1 purple cayenne chile, minced
1 garlic clove, minced
1/4 cup purple basil leaves, minced
Salt and freshly ground pepper
Mince the garlic, chile, and onion. I use a mini-food-chopper. Add the basil and chop some more. It’s like making a pesto. Remove to a bowl.
Chop the tomatillos (but not a fine as the onions). Fold them into the pesto. Season with salt and pepper to taste.