Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      tablespoons   sour cream
     1/2  cup           buttermilk
   1      teaspoon      minced garlic
   1      teaspoon      minced red onion
   1      tablespoon    fresh lime juice
   1      teaspoon      cayenne pepper
                        salt -- to taste
                        freshly ground black pepper -- to taste

Preparation:

Combine the sour cream, buttermilk, garlic, onion, lime juice, and cayenne. Add salt and pepper to taste. Mix well. May be prepared 1 day ahead and refrigerated.