Tuna Fish Casserole
["2 (6 1/2 oz.) cans tuna", "1 (10 1/2 oz.) can cream of mushroom soup", "1/4 tsp. dry mustard", "dash of cayenne pepper", "1 (16 oz.) can green peas with liquid", "1 (4 oz.) jar pimentos", "1/2 c. minced onion", "1 c. shredded American cheese", "1 (3 1/2 oz.) can French fried onion rings"]
["Combine ingredients and put in casserole.", "Bake uncovered in 375\u00b0 oven for 25 minutes.", "This may be made ahead, adding onion rings just before putting in oven.", "Serves 6 to 8."]
["tuna", "cream of mushroom soup", "dry mustard", "cayenne pepper", "green peas", "pimentos", "onion", "American cheese", "onion"]