Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   4      tablespoons   unsalted butter
   1      medium        onion -- chopped
   1      clove         garlic -- minced
     1/2  cup           diced celery
   1      cup           water
   1      cup           catsup
   1                    diced red pepper
     1/4  cup           fresh lime juice
   2      tablespoons   cider vinegar
   1      tablespoon    Worcestershire sauce
   1      slice         lime cut in half
     1/2  teaspoon      ground cumin
     1/4  teaspoon      chili powder
   3      dashes        Tabasco sauce
                        salt to taste
     1/4  cup           chopped fresh coriander

Preparation:

Microwave butter, onion and garlic in a medium microwave safe bowl, covered with plastic wrap, on high power for 2 minutes. Stir in celery and microwave covered for 2 minutes. Stir in remaining ingredients except coriander until blended. Microwave covered for 7 minutes, stirring halfway through cooking. Puree sauce in a blender bowl or food processor. Transfer to bowl and stir in all but 1 tb coriander. Garnish with remaining coriander. Serve warm or at room temperature. Makes 2-1/2 cups. 81 calories per 1/4 cup.