Cheese Sauce - cooking recipe

Ingredients

1 Tbsp. butter
1/2 Tbsp. flour
salt and pepper to taste
pinch of cayenne pepper
1 c. milk
1 egg yolk
1 Tbsp. Parmesan cheese

Preparation

Melt butter in small saucepan and stir in flour; salt and pepper to taste.
Add milk, stirring continuously until sauce thickens.
Remove pan from heat and stir in the egg yolk.
Stir in the cheese.
Makes about 1 1/4 cups.