Step 1

Peel, rinse and dry the tomatillos. Slice them in half and set them onto a large lined baking sheet.

Step 2

Slice 1 serrano pepper in half and set it on the baking sheet with the tomatillos, skin sides up.

Step 3

Heat oven to 425 degrees F (220C). Roast the tomatillos and serrano peppers for 15 minutes, or until the tomatillos begin to char slightly. The skins will darken and puff.

Step 4

Remove and transfer to a food processor or blender. You can peel the serranos if you wish.

Step 5

Add the remaining ingredients and process until smooth. Adjust for salt and serve. Or, refrigerate in a sealed container to let the flavors mingle. Great with tortilla chips!