Baked Spaghetti
["8 oz. pkg. spaghetti, broken into bite-size pieces", "1/2 c. onion", "1/2 c. butter", "1 lb. hamburger meat", "1 pkg. pepperoni", "16 oz. jar spaghetti sauce", "4 oz. Cheddar cheese", "4 oz. Mozzarella cheese", "4 oz. Swiss cheese"]
["Cook spaghetti according to directions on package. In casserole dish, melt butter with onion. Brown hamburger and drain. Layer the casserole dish with the following: spaghetti, hamburger, spaghetti sauce, Cheddar cheese, Mozzarella and Swiss cheese. Top with pepperoni slices. Bake at 425\u00b0 for 20 minutes."]
["onion", "butter", "hamburger", "pepperoni", "spaghetti sauce", "Cheddar cheese", "Mozzarella cheese", "Swiss cheese"]