Step 1

Pull the husks off the tomatillos and give them a good rinse.  Cut the stems out of the tomatillos.

Step 2

Roast the tomatillos in a 400F oven for 10-20 minutes or until they start to turn army green in color.

Step 3

Add the tomatillos to a blender along with 1/2 small onion, 1 peeled garlic clove, 10-12 sprigs cilantro (using the upper stems is fine), and 1/4 of the serrano pepper.  (Be sure to give the cilantro and serrano a good rinse.)

Step 4

Pulse blend and taste for heat level.  If you want more spice add another quarter of serrano.  Keep adding serrano until it tastes "right" to you.

Step 5

Salt to taste (I typically do not add much salt).

Step 6

Serve immediately and store leftovers in an airtight container in the fridge.