Pierogi Casserole
["6 c. mashed potatoes", "1 (8 oz.) pkg. cream cheese, softened", "1 tsp. salt", "1 small jar Cheez Whiz", "1 large onion, sliced", "3 sticks butter or margarine", "1 lb. lasagna noodles, cooked"]
["Mix mashed potatoes, cream cheese, salt and Cheez Whiz in bowl.", "Saute onion in butter until brown."]
["potatoes", "cream cheese", "salt", "onion", "butter", "lasagna noodles"]