In a large skillet, cook beef over medium heat until no longer pink. Drain.

In a greased 2-1/2-qt. Baking dish, layer a third of the spaghetti sauce sauce, half of the ravioli and beef and 1/2 cup cheese.

Repeat layers.

Top with remaining sauce and cheese.

Cover and bake at 400° for 40-45 minutes or until heated through.