Cheese Sauce
["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"]
["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."]
["margarine", "flour", "salt", "milk", "mustard", "cheese"]