How to Make spicy salsa verde out of serrano peppers and tomatillos

This bright, tangy salsa goes wonderfully with tortilla chips, or as a dressing for fish and pork. To make this very simple recipe, you will need: 1 serrano pepper, 1/4 a roasted onion, 3 cloves roasted garlic, 1 pound of husked and boiled tomatillos and a pinch of salt.