Pierogi Casserole
["10 to 12 potatoes, peeled, boiled and mashed", "3/4 c. shredded Cheddar cheese", "1 c. chopped onion", "1 pkg. lasagna noodles, cooked", "1 to 2 sticks margarine or butter"]
["Cook noodles according to package directions.", "Saute onions in margarine until soft.", "Mash potatoes.", "Add cheese and beat with mixer.", "Add 1/3 of onions to potato mix.", "Add salt and pepper to taste."]
["potatoes", "Cheddar cheese", "onion", "lasagna noodles", "margarine"]