Once the pasta is cooked, drain, and place back into pot. Add about half of the tomato sauce and stir until every single ravioi is covered in sauce. Now time to layer (almost like a lasagna)... In a baking dish, add a layer of sauce to the bottom, then a scoop of raviolis, then a large scoop of sausage, then a scoop of mozarrella cheese, parmesan cheese, and repeat until you are out of ingredients. Bake for about 20-25 minutes until the cheese is melted. Enjoy!