Mustard Sauce
["1 Tbsp. dry mustard", "1/4 c. vinegar", "1/2 c. mayonnaise", "2 Tbsp. sugar", "1 egg, slightly beaten"]
["Combine mustard, sugar, vinegar and egg in small saucepan. Blend well and cook over low heat, stirring constantly. Refrigerate 10 to 15 minutes.", "Stir in mayonnaise.", "Store in refrigerator.", "Yield: 3/4 cup."]
["mustard", "vinegar", "mayonnaise", "sugar", "egg"]