Step 1

In a large skillet on the stove-top, cook and crumble the ground beef until no longer pink. Drain off excess cooking fat.

Step 2

Add cooked ground beef, onion, garlic, and diced tomatoes to the skillet and simmer for 5 minutes over medium-high heat.

Step 3

Add marinara sauce and Italian seasoning to the pan, stir and simmer an additional 5 minutes.

Step 4

Pour 1 cup of the sauce into the bottom of a 3.5 quart casserole slow cooker OR a 6 quart or larger oval slow cooker.

Step 5

Add half of the frozen ravioli pasta on top of the sauce.

Step 6

Layer with half of the sauce mixture, the rest of the ravioli and the remaining sauce.

Step 7

Top with mozzarella and Parmesan cheeses evenly over the top.

Step 8

Cover and cook on LOW for 4 hours.

Step 9

Remove lid and sprinkle fresh basil over top of casserole.

Step 10

Serve and enjoy!