1/2 cup dry mustard
1/2 cup vinegar
1 egg
1/4 cup sugar
pinch of salt

Mix in jar - 1/2 cup dry mustard and 1/2 cup vinegar. Let stand over night. In a sauce pan, beat 1 egg - stir in 1/4 cup sugar, pinch of salt and above mustard mixture. Cook over low heat stirring constantly until mixture thickens. Cool. Blend in 1 cup mayonnaise (very good makes Baloney taste like ham). Refrigerate.