Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  cup           sour cream
     1/2  cup           plain yogurt
   1      tablespoon    finely chopped fresh parsley
   1      teaspoon      onion powder
     1/2  teaspoon      garlic salt
   1      tablespoon    Dijon mustard

Preparation:

Mix all ingredients. Cover and refrigerate at least 1 hour. Serve with meatballs, cocktail sausages or fresh vegetables if desired. Source: Betty Crocker's 40th Anniversary Edition Cookbook, page 1