I tried out this recipe from one of my recent real simple magazines.
You need cheese ravioli, frozen spinach, a jar of pasta sauce, mozzarella, grated parmesan cheese.
First put a layer of sauce down
Then spinach and cheese
On the last layer cover the ravioli with sauce, mozzarella, and grated parmesan.
Cover with foil and bake at 350 for 25 minutes; then uncover and bake for 5-10 more minutes.
Here is a printable recipe. This was quick, easy, and good. That being said it wasn't "super delicious" and I'm not sure how often I would remake it. Give it a try and decide for yourself!