1 pkg. (7 oz.) spaghetti noodles
2 tbsp. butter
1/3 c. grated Parmesan cheese
2 eggs, well beaten
1 lb. ground beef
1 sm. onion, chopped
1 lg. jar (32 oz.) spaghetti sauce
3-4 c. mozzarella cheese
1 pkg. (3 1/2 oz.) pepperoni

Cook noodles according to package directions. Rinse and drain. Combine with butter, grated Parmesan and eggs. Spoon into a greased 9 x 13 inch baking pan.

Brown ground beef with onion, drain. Spoon atop spaghetti noodles. Pour spaghetti sauce over all and sprinkle liberally with mozzarella cheese. Arrange slices of pepperoni over the surface. Cover with aluminum foil and bake in preheated 350 degree oven 30 minutes. Remove foil and continue baking 20 minutes. Let stand 5-10 minutes before cutting into serving pieces.