Cheese Sauce

Ingredients:
- 2 Tbsp. margarine
- 1/4 c. flour
- 1/2 tsp. salt
- 2 c. milk
- 1/2 tsp. prepared mustard
- 1 1/2 c. cut up cheese

Directions:
- Melt margarine in a pan.
- Mix in flour and salt. Add milk slowly, stirring until smooth. Cook and stir until sauce thickens. Add mustard and cheese. Stir over low heat until cheese melts. Makes 2 2/3 cups sauce.