1 lb. lean ground beef 1/4 cup chopped onion 1 cup tomato pasta sauce 6 oz. (1 1/2 cups) shredded mozzarella or Monterey Jack cheese 1/2 cup sour cream 1 (8-oz.) can Pillsbury® Refrigerated Crescent Dinner Rolls 1/3 cup grated Parmesan cheese 2 tablespoons butter or margarine, melted 1. Heat oven to 375°F. In large skillet, cook ground beef and onion over medium heat for 8 to 10 minutes or until beef is thoroughly cooked, stirring frequently. Drain. Stir in pasta sauce; cook until thoroughly heated. 2. Meanwhile, in medium bowl, combine mozzarella cheese and sour cream; mix well. 3. Pour hot beef mixture into ungreased 9 1/2 or 10-inch glass deep-dish pie pan or 11x7-inch (2-quart) glass baking dish. Spoon cheese mixture over beef mixture. 4. Unroll dough over cheese mixture. (If using pie pan, separate dough into 8 triangles; arrange points toward center over cheese mixture, crimping outside edges if necessary.) In small bowl, mix Parmesan cheese and butter. Spread evenly over dough. 5. Bake at 375°F. for 18 to 25 minutes or until deep golden brown. Recipe note: Developed by Madella Bathke of Wells, MN for Bake-Off® Contest 28, 1978.