Heat the oven to 375°F. Spray a 9x9 baking dish with cooking spray.
Make the sauce
Heat the olive oil in a large skillet, and sauté the onion until softened.
Add the garlic and Italian sausage and cook until browned.
Add the pasta sauce, seasoning and water.
Add the water, and allow to simmer for 10 minutes.
Spread a little sauce mixture in the baking dish.
Top with half the ravioli, half the mozzarella cheese and half the remaining sauce.
Top with the remaining ravioli and the rest of the sauce (don’t add the rest of the cheese yet!)
Cover the baking dish with foil.
Bake for 30 minutes or until the mixture is hot and bubbling.
Uncover the baking dish. Sprinkle with the remaining mozzarella cheese then bake for 10 to 15 more minutes or until the cheese is melted.
Allow to cool for 10 minutes. Sprinkle with the Parmesan cheese and parsley.
What to do with leftoversStore in a covered container in the refrigerator for up to 4 days. Reheat to piping hot!Substitutions/AdditionsYou can use any type of ravioli, with any filling you like. They don't even have to be square! The round ones are awesome. Just layer them the same way as the squares.Ground beef can be used in place of sausage, and you can use up to 1lb of meat in the sauce with no other changes.Fresh mozzarella can be used in between the layers for a thick, gooey cheesy center.Can you bake fresh ravioli without boiling? Absolutely! The sauce with the added water will cook them right up for you.What goes with ravioli for dinner?I love garlic knots, an arugula salad or some steamed vegetables.