Heat oven to 350°F. Spray 13x9-inch (3- quart) baking dish with cooking spray.
In a skillet, cook 1 1/2 lb ground beef over medium-high heat, stirring frequently, until brown; drain. Stir in 2 jars (25.5 oz each) of marinara pasta sauce.
Spread 1 cup sauce mixture in baking dish. Have ready 2 bags (18 oz each) frozen cheese ravioli and 2 cups shredded mozzarella cheese (8 oz). Place 1 layer of frozen ravioli evenly over sauce in a baking dish. Top with one-third of the remaining sauce and one-third of the cheese. Repeat for a total of 3 layers.
Cover with foil. Bake 40 minutes. Remove foil; bake about 5 minutes until cheese is melted. Serve garnished with 2 tablespoons of chopped fresh basil leaves.
