Cook beef in large skillet over medium-high heat until meat is brown, stirring to separate meat; drain fat. Add spagetti sauce. Reduce heat to low. Heat through, stirring occasionally; set aside. Combine cottage cheese and sour cream in medium bowl; blend well.
Spoon 1 1/2 cups meat sauce in bottom of 13x9-inch pan. Place 1/2 of the uncooked noodles over sauce, then 1/2 the cheese mixture, 4 slices mozzarella, 1/2 the remaining meat suace and 1/4 cup Parmesan cheese. Repeat layers starting with noodles. Top with remaining 4 slices mozzarella cheese. Pour water around sides of pan. Cover tightly with foil. Bake in a preheated 350* F. oven 1 hour. Uncover and bake 20 minutes.
Let stand 5 minutes before serving.