Mustard Salad Dressing - cooking recipe

Ingredients

3/4 c. sugar
4 Tbsp. flour
1 Tbsp. prepared mustard
1 Tbsp. butter
1 egg
1 c. milk
1/2 c. vinegar

Preparation

In a double boiler mix sugar, flour, mustard and butter.
Add egg, milk and vinegar.
Cook until thickened.