In a bowl combine the marinara sauce, diced tomatoes, Italian seasoning, and minced garlic.

Lightly grease the slow cooker. Spread a thin layer of sauce on the bottom.

Add half of the frozen ravioli in an even layer and half of the sausage.

Spoon half of the sauce over the ravioli sausage layer.

Sprinkle with half of the mozzarella cheese and half of the pepperoni slices.

Repeat the layers with the remaining ravioli, sauce, sausage, mozzarella, and pepperoni.

Sprinkle the parmesan cheese over the top.

Cover and cook on LOW for 3–4 hours or HIGH for 1½–2 hours, until the ravioli is tender and the cheese is melted.

Sprinkle with chopped parsley before serving. Tips and Tricks

Frozen ravioli works best because it holds its texture during slow cooking

Use a thicker marinara sauce so the casserole doesn’t become watery

Layering helps everything cook evenly and gives that pizza casserole look

Add extra pepperoni on top during the last 30 minutes for a prettier finish