This is so good and another way to serve spaghetti. Just make the spaghetti however you normally make it. But then combine the cooked spaghetti and your sauce in a large bowl until it's mixed thoroughly. Spray a 9 x 13 baking pan with Pam and pour the spaghetti mixture into the pan, evenly. Top with 1 cup grated mild Cheddar cheese and bake at 350* for 30 minutes or until heated through and cheese is bubbly.
Add some garlic bread, a veggie or salad and you have a wonderful Fall evening meal.
This could be made in a smaller quanity and baked in a smaller pan for, say two or three servings.