Spoon 1 cup pasta sauce onto bottom of a 9 x 11 x 2-inch baking
dish. Layer 1/2 of the frozen ravioli on top of sauce. Cover with
1/2 ground beef and then 3/4 cup mozzarella cheese. Cover with 1 cup sauce.
Repeat layering with pasta and ground beef and top with
remaining sauce, making sure the sauce covers the ravioli.
Bake, covered, for 35 minutes.
Sprinkle with remaining mozzarella cheese and bake, uncovered, until
cheese is browned and bubbly (about 5 minutes).