Coat a 13 x 9-inch baking dish with cooking spray and spoon in a third of the
sauce. Arrange 12 ravioli on top and scatter the spinach over them. Top with half
of each cheese. Cover with another layer of ravioli and the remaining sauce and
Cover with foil and bake 25 minutes.
Uncover and bake 5 to 10 minutes more
or until bubbly.