Yield: 1 3/4 cups. 15 calories per tablespoon.

1/2 c. buttermilk
6 tbsp. low-calorie mayonnaise
1/4 c. water
1 tbsp. vinegar
1/3 c. minced fresh parsley
3 tbsp. grated Parmesan cheese
Salt & pepper to taste
Dash of Tabasco

Combine all ingredients well in blender or food processor.