Pierogi Pie
["1 box lasagna noodles", "10 to 12 potatoes, cooked and mashed", "3/4 lb. shredded Cheddar cheese", "2 sticks butter", "2 large onions, diced"]
["Cook potatoes and mash with cheese.", "Cook noodles.", "Saute onions in butter.", "Grease pan (9 x 13-inch).", "Layer noodles, potatoes, onions and butter mixture.", "Cover with foil and bake 30 minutes at 350\u00b0."]
["lasagna noodles", "potatoes", "Cheddar cheese", "butter", "onions"]