Tuna Casserole
["1 Tbsp. margarine", "1/4 c. chopped onion", "1 can mushrooms, drained", "2 cans tuna, drained and flakes", "1 Tbsp. lemon juice", "1/4 tsp. salt", "1/8 tsp. pepper", "3/4 c. Hellmann's mayonnaise", "1 (8 oz.) pkg. cooked noodles", "1/2 c. shredded Cheddar cheese"]
["In a small skillet, melt margarine over medium heat.", "Simmer onion, pepper and mushrooms, stirring until tender, about 5 minutes.", "Stir together with next 6 ingredients.", "Add noodles, mixing well.", "Turn into greased 2-quart casserole.", "Top with cheese.", "Bake uncovered at 400\u00b0 for 20 minutes.", "Serves 6.", "You should use Hellmann's only."]
["margarine", "onion", "mushrooms", "tuna", "lemon juice", "salt", "pepper", "mayonnaise", "noodles", "Cheddar cheese"]