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

Cook and drain noodles. While a little warm add Parmesan cheese, butter and beaten eggs. Place in well greased 9 x 13 inch casserole.

Brown hamburger and onion, drain and season to taste. Place on noodles. Put spaghetti sauce on top of hamburger and then grated mozzarella cheese. Top with sliced pepperoni.

Cover with foil. Bake at 350 degrees for 20 minutes. Remove foil and bake 15 minutes more. Let stand 5-10 minutes before serving.