Crumble the beef mince into a large frypan over medium-high heat. Cook and stir until no longer pink. Drain excess oil then stir in the spaghetti sauce and tomatoes.
Spread 1/3 of the sauce in the bottom of a large baking dish. Arrange 1/2 of the ravioli over the sauce. Sprinkle 1/2 of the mozzarella cheese and 1/2 of the cheddar cheese over the ravioli. Repeat layers ending with the last of the sauce on top. Cover with aluminium foil.
Bake for 30 minutes in the preheated oven. Sprinkle Parmesan cheese over the top before serving.