Boiled Salad Dressing

2 Tb. butter 1 tsp. mustard 2 Tb. flour 1 c. milk 1 tsp. salt 2 eggs 2 tsp. sugar 1/4 c. vinegar

Melt the butter in the inner pan of a double boiler, add the flour, salt, sugar, mustard, and milk. Cook over the flame until the mixture is thickened. Beat the eggs, stir them into the mixture, and add the vinegar, beating rapidly.
Place in the large pan of the double boiler and allow this to cook until the eggs have thickened. Cool and serve.