1/4 cup butter

1/4 cup flour

1 cup milk

4 separated eggs

1/2 lb of old cheddar cheese

Melt butter in a saucepan.  Blend in flour and cook for one minute until mixture bubbles  Remove from heat and gradually whisk in milk.  Cook until thickened while stirring constantly.  Remove from heat and blend in cheddar cheese until melted.  Separate eggs.  Take yolks and add to cheddar cheese mixture.  Mix well.

Beat egg whites until stiff.  Fold egg whites into sauce.  Put the mixture into an ungreased casserole.  Bake at 300 degrees for 1 1/4 hours.