Step 1

In a medium-sized non-stick skillet set to medium-high heat, add the ground beef. Add the salt, pepper, garlic powder, oregano and onion. Cook until the meat is browned. Don't drain all the liquid off the meat; keep a few tablespoons in the meat to keep it moist.

Step 2

Spray the slow cooker with non-stick spray.

Step 3

Add half of the marinara sauce to the bottom of the slow cooker.

Step 4

Add HALF of the bag of ravioli on top of that sauce.

Step 5

Add all of the ground beef mixture over the ravioli.

Step 6

Add the remaining ravioli over the meat.

Step 7

Pour over the remaining sauce.

Step 8

Sprinkle over the mozzarella cheese.

Step 9

Place the lid on the slow cooker. Cook on LOW for 4 hours.

Step 10

Serve and enjoy!