01 -
Heat a large pan on medium and cook the ground beef until browned. Drain off the grease and put it aside.
02 -
Put some non-stick spray or oil on the sides and bottom of your crockpot. Spoon just a bit of marinara across the base.
03 -
Start with frozen ravioli on top of the sauce. Add a handful of cooked beef, then sprinkle Parmesan and mozzarella on top. Keep layering—add more sauce, ravioli, beef, and cheese—till you’ve used up everything, with cheese being the last layer.
04 -
Put the lid on tightly and cook on low for 4–5 hours. Or, if you’re in a hurry, set it to high for 2–3 hours. The ravioli should get soft, and the cheese should melt nicely. Serve warm and, if you'd like, throw on some extra Parmesan or fresh greens.