Simple Slow Cooker Ravioli Lasagna

25 oz. frozen cheese ravioli
3 C. pasta sauce
1C. shredded mozzarella
Parmesan cheese 

Spray slow cooker with non stick spray.

Place 1 cup of pasta sauce on the bottom of slow cooker and place half of your frozen ravioli on top followed by 1 more cup of sauce and a 1/2 cup cheese.  Layer remaining ravioli, sauce, and cheese.
Cover and cook on low 7-8 hours.
Top pasta with parmesan cheese.