White Barbecue Sauce

1 1/2 cups mayonnaise
1/4 cup water
1/4 cup white wine vinegar
1 tbsp. coarsely ground pepper
1 tbsp. Creole mustard
1 tsp. salt
1 tsp. sugar
2 garlic cloves, minced
2 tsp. prepared horseradish
(if you prefer a thicker sauce, omit the water)

Whisk together all ingredients until blended. Store in the refrigerator up to 1 week