Combine water and pasta sauce in a bowl. Cover bottom of 13x9 baking dish with 1 1/2 cup sauce. Arrange a layer of uncooked noodles, slightly overlapping on top of sauce. Spread half the sour cream and half the mozzarella over noodles. Sprinkle with Parmesan. Add another layer of sauce. Repeat with another layer of noodles, sour cream and cheese. Add ground beef and cover with sauce. add another layer of noodles and toop with remaining sauce, spreading it evenly to cover all edges. Sprinkle with Parmesan. Cover tightly with heavy duty foil. Set on a jelly roll pan or on another piece of foil. Bake in oven preheated to 350° for 1 - 1 1/2 hrs. or until knife goes easily through pasta. Let stand, covered on rack for at least 15 minutes.
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