Instructions:

Begin by browning the ground beef or Italian sausage and draining any excess fat—this forms the foundational layer of your lasagna.

Line the bottom of your slow cooker with a thin layer of marinara sauce to prevent sticking.

Arrange a layer of frozen cheese ravioli, ensuring the sauce is adequately covered.

Spoon a portion of the browned meat onto the ravioli layer, sprinkle with Italian seasoning, and add the canned diced tomatoes.

Generously sprinkle mozzarella and Parmesan cheeses over the meat and tomato layer.