Tuna And Noodle Au Gratin
["3 Tbsp. margarine", "2 Tbsp. flour", "1 1/2 c. milk", "1 tsp. salt", "1/4 tsp. pepper", "1/2 tsp. paprika (optional)", "1/2 lb. American cheese", "1 small can mushrooms", "2 cans tuna", "1 (14 oz.) pkg. noodles, cooked"]
["Make a white sauce of margarine, flour, milk and seasonings. Add cheese and stir until smooth on low heat."]
["margarine", "flour", "milk", "salt", "pepper", "paprika", "American cheese", "mushrooms", "tuna", "noodles"]