Brown meat in large skillet; drain.
Stir in pasta sauce and water.
Mix ricotta, shredded cheese, Parmesan, egg and parsley.
Spoon 1 cup meat sauce into slow cooker; top with layers of half each of the noodles, broken to fit, and cheese mixture.
Cover with 2 cups meat sauce. Top with remaining noodles, broken to fit, cheese mixture and sauce. Cover with lid.
Cook on HIGH for 4-6 hours or until liquid is absorbed.
Sprinkle with topping cheeses; let stand, covered, 10 minutes or until melted.