1 stick butter
3/4 c. grated Parmesan cheese
1 small bag spaghetti, cooked and drained
1 jar spaghetti sauce
2 c. Mozzarella cheese

Cook spaghetti and drain. Melt butter and pour into bottom of casserole dish. Sprinkle Parmesan cheese on top of melted butter. Top with spaghetti, sauce and Mozzarella cheese.

Bake at 350°F until top layer of cheese is melted, approximately 30 minutes.