Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      tablespoons   oil
   4      cups          chopped onions
     1/4  cup           fresh jalapenos minced
     1/4  cup           fresh Serranos minced
  15      cloves        garlic -- minced
   2      cups          ketchup
   1      cup           Worcestershire sauce
   1      cup           strong black coffee
     2/3  cup           dark brown sugar
     1/2  cup           cider vinegar
     1/2  cup           lemon juice
   6      tablespoons   chili powder
   3      tablespoons   prepared yellow mustard
   1      tablespoon    salt

Preparation:

In a saucepan, heat the oil. Add the onions, jalapenos, Serranos, and garlic, and cook them over low heat until soft. Add everything else, cover the pan, and simmer 40 minutes. Allow the mixture to cool to room temperature. Strain out the remaining solids, liquefy them in a food processor, and add them back to the strained liquid, stirring thoroughly. Set the sauce aside for several hours before serving to permit flavors to blend. Refrigerate the sauce, covered, and use it as needed. It will keep for weeks.