Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2       cup          Tomatoes, canned, with juice
   1       small        Onion
   2                    Chile serrano
   1       pinch        Sugar
                        Salt, to taste

Preparation:

Now are we talking about the mild, Old El Paso-type green chiles (which are a mild sort of chile poblano), or are we talking about jalapenos and serranos? It makes a buncha difference. Salsa picante (which is what we mean when we talk about "salsa" down here) is made with one or both of the last two. Acting on the presumption that it's salsa picante that you mean, here's a recipe. One serrano equals two jalapenos. If you use jalapenos, removing the veins from the inside will make it less hot. Place all ingredients in a blender or food processor and blend until finely chopped. Pour into a saucepan and bring to a boil. Lower heat and simmer 30 minutes. Cool slightly, pour into a pint jar, and refrigerate, or process in a boiling water bath 10 minutes (in which case reduce the cooking time the same amount). This sauce will keep three to four weeks in the refrigera