Dan Green's Sauce for Pork

      3 c  Ketchup                             2 tb Worcestershire sauce
    1/4 c  Sugar                               2 tb Chili powder
    1/2 c  Tarragon Vinegar                    1 tb Cayenne
      1 ea Medium onion, minced                1 tb Garlic salt

  Combine all ingredients in a saucepan and cook over medium heat for 10
  minutes.  Stir frequently.  Allow to cool down to room temperature.  Brush
  the mixture on the pork during the final phase of cooking;  if using
  indirect heat, you may use it a mop.

  Source:  The Great Barbecue Companion, Mops, Sops, Sauces, and Rubs.