Mustard Sauce - cooking recipe

Ingredients

1 c. brown sugar
1 heaping Tbsp. flour
2 Tbsp. dry mustard
4 eggs, beaten
1/2 c. (scant) vinegar
1 (10 to 12 oz.) jar apple jelly

Preparation

Mix brown sugar, flour and mustard.
Add eggs, vinegar and jelly.
Cook in top of double boiler until thick, stirring constantly.
After sauce has thickened, use beater if jelly has not dissolved completely.