1 c. fat-free mayonnaise
1 c. buttermilk
1/4 tsp. garlic powder*
1/4 tsp. onion powder*
1/2 tsp. dried parsley
1 tsp. dried chives

Blend mayonnaise and buttermilk together gradually. Stir in rest of ingredients. Mix well and refrigerate.

*Use 1/2 teaspoon of each of these for a stronger flavor, according to your taste.