Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  15                    tomatillos -- (approx)
   1      medium        sized yellow onion
     1/2  bunch         cilantro
   1      teaspoon      garlic
   1                    jalapeno pepper
   1                    salt -- (must use some to
                        -- bring
                        out the flavor of the
                        cilantro)

Preparation:

Throw everything into the food processor and puree. My 1/2 mexican roommate used to then throw the salsa into a pan and quick fry it for a few minutes. Tastes great either way.