2 tbsp. olive oil
1 lb. Italian sausage, cut into 1 inch pieces
1 onion, chopped
1/4 lb. mushrooms, sliced
1/4 lb. tomatoes, peeled
Salt & pepper
3/4 lb. cooked spaghetti
1/2 lb. Mozzarella cheese, sliced
3 tbsp. grated Parmesan cheese

Brown the sausage in the oil over a medium heat for about ten minutes. Add onion, mushrooms and tomatoes. Season to taste with salt and pepper and cook uncovered over a low heat for about 1 hour, stirring occasionally. Put cooked spaghetti in a baking dish and cover with the slices of Mozzarella cheese. Pour sauce over the cheese and sprinkle with grated Parmesan cheese. Bake at 350 degrees for 10 minutes.