This Lazy Lasagna is a super easy Crockpot recipe made with frozen ravioli, homemade tomato sauce with beef and loads of cheese. You'll love all the cheesy, hearty layers. Plus, it's freezer friendly!
Add olive oil to a large pot over medium heat. Add ground beef, onions, garlic, Italian seasoning, red chili flakes, salt and pepper. Cook for 5 to 7 minutes, until ground beef is cooked and onions are softened. Drain excess grease if needed.
Stir in crushed tomatoes.
Spread a small layer of sauce on the bottom of a 6 quart slow cooker. Add a layer of frozen ravioli. Add a layer of mozzarella cheese. Repeat with a layer of sauce, ravioli and mozzarella cheese until you end up with sauce on top.
Top with remaining mozzarella and Parmesan cheese. Cover and cook on LOW for 4 hours.
Turn off slow cooker and let sit for 20 minutes before serving. Sprinkle with dried parsley, if desired.