Mustard Sauce
["3 egg yolks", "1/2 c. sugar", "1 can tomato soup", "1/2 c. mustard", "1/2 c. vinegar", "1/2 c. butter"]
["Cook all ingredients in a double boiler for 1/2 hour.", "This would be a wonderful addition to a special ham dinner.", "Serves 18 nicely."]
["egg yolks", "sugar", "tomato soup", "mustard", "vinegar", "butter"]