Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. Spread 1 cup of the pasta sauce in dish. To remaining sauce in jar, add water and mix well.
Cut sausage links in half lengthwise; remove casings. Shape each piece of sausage into roll; stuff into uncooked pasta shell. Place stuffed shells on sauce in dish. Pour remaining pasta sauce mixture over shells.
Cover tightly with foil; bake 1 hour 20 minutes. Sprinkle with mozzarella and Parmesan cheeses; bake uncovered 10 minutes longer or until cheeses are melted and pasta is tender. Let stand 10 minutes before serving.