Brown 1lb. ground chuck, onion, garlic (to taste). Drain. Add 1 large jar of Ragu (or any) spaghetti sauce. Mix well.
In separate bowl, mix 1lb. ricotta or cottage cheese, 1/4 cup milk, and 1 egg. Beat until thoroughly mixed and smooth. Then mix in 1lb. shredded mozzarella cheese and 1/2 cup of Shredded Parmesan/Romano cheese.
Grease the slow cooker w/Pam on bottom and sides.
Put about 1/4 of the meat sauce in the bottom. Put a layer of noodles. (break if needed) Put about 13 of cheese mixture on top of that. Then repeat w/sauce, noodles, cheese for another 2 layers. Top w/meat sauce. Cook on low for 4-6 hours or until noodles are tender. I like to add Grated cheese on top the last few minutes and cook until the cheese is melted good.