Baked Spaghetti | The Girl Who Ate Everything - For easy version, use left-over spaghetti & meat-sauce. Butter bottom of baking dish, lay onion, add half spaghetti & meat-sauce, cover with tomatoes, shredded cheddar cheese, pepper, salt and oregano. Add the rest of the spaghetti and sauce, and repeat procedure. For the topping, add crush garlic, cheese. Bake away!