Aunt Sylvia'S Mustard Sauce
["1/2 c. can tomato soup", "1/2 c. sugar (Sprinkle Sweet)", "1/2 c. vinegar", "1/2 c. prepared mustard", "1/2 c. butter", "3 egg yolks"]
["Whisk all ingredients together except butter.", "Heat butter and add mixture to pan.", "Simmer 5 to 10 minutes until thick.", "You can not substitute margarine as it will separate later.", "This sauce is great for any meats.", "If you want a good mustard barbecue sauce, add 1 to 2 tablespoons of Matouk's hot sauce after it cools down and mix in."]
["tomato soup", "sugar", "vinegar", "prepared mustard", "butter", "egg yolks"]