Step 1

In the oven, place the cooking rack 4-6 inches below the broiler.  Turn on the broiler and place the tomatillos, jalapeno peppers, and garlic on a baking sheet. Broil for 4-5 minutes, then flip all the ingredients using a spatula, and broil for another 4-5 minutes. They should be slightly charred and blistered. Let them cool to the touch.

Step 2

Transfer the tomatillos, peppers, onion, and garlic into a high-powered blender or food processor. Add the oregano, cumin, and salt, and blend until smooth. If the salsa is too thick for your liking, add one tablespoon of water at a time and blend until it reaches your desired consistency.