Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   4                    ripe roma tomatoes*
   2                    serrano chiles**
     1/2  small         onion -- chopped
   1                    lime -- juice of
   1      teaspoon      salt or to taste
                        freshly ground pepper

Preparation:

*cored and chopped roughly **chopped, seeds optional Blend all ingredients.