Custard Dressing
["1 egg + 1 yolk, lightly beaten", "1/2 c. sugar", "1 1/2 tsp. cornstarch", "1 tsp. dry mustard", "1/4 c. vinegar", "1/4 c. water", "3 Tbsp. soft butter", "1/2 c. mayonnaise"]
["Whisk eggs, sugar, cornstarch and mustard together.", "Slowly whisk in water and vinegar.", "Cook until mixture thickens.", "Remove from heat and stir in butter and then mayonnaise.", "Chill."]
["egg +", "sugar", "cornstarch", "dry mustard", "vinegar", "water", "butter", "mayonnaise"]