Easy Spinach Ravioli Lasagna

1 jar (about 26 ounces) of your favorite marinara sauce (I always use Francesco Rinaldi Sweet N Tasty)
20 ounces fresh or frozen cheese ravioli
1 package frozen creamed spinach, defrosted
3 cups shredded mozzarella cheese
1/2 cup parmesan cheese
 

Heat oven to 375 degrees. Pour half of the sauce into a 9- by 13-inch pan.  Place half of the ravioli on top. Spread the creamed spinach over the raviolis. Sprinkle half the cheese over the spinach. Layer the rest of the ravioli, followed by the rest of the mozzarella cheese. Pour remaining sauce over the cheese and sprinkle parmesan on top.
 

Cover with foil and bake for 40 minutes hour. Uncover and bake for 10 more minutes. Remove from oven. Let sit at least 5 minutes before cutting.
 

Makes 8 servings.