Brown meats in a skillet and drain. Stir in Barilla spaghetti sauce and water (pour the water into the sauce jar and shake to get excess sauce!).
Mix ricotta, cottage cheese, 1/2 of the Parmesan, 1/2 of the mozzarella, egg and parsley.
Put 1 cup of the meat sauce into your slow cooker, and top with 2 noodles (broken to fit) and 1/3 of the cheese mixture. Repeat two more times, and cover with remaining meat sauce. Cover with lid.
Cook on low about 5 hours. Top with remaining cheeses, cover and let the cheese melt-about 10-20 mins.