1 pound ground beef 1/4 cup chopped onion 1/2 teaspoon salt 1/2 teaspoon pepper, divided 1 pound medium pasta shells, cooked and drained 4 cups (16 ounces) shredded part-skim mozzarella cheese, divided 3 cups (24 ounces) 4% cottage cheese 2 large eggs, lightly beaten 1/3 cup grated Parmesan cheese 2 tablespoons dried parsley flakes 1 jar (24 ounces) pasta sauce In a large skillet, cook beef and onion over medium heat until meat is no longer pink; drain. Sprinkle with salt and 1/4 teaspoon pepper; set aside. In a large bowl, combine the pasta, 3 cups mozzarella cheese, cottage cheese, eggs, Parmesan cheese, parsley and remaining pepper. Transfer to a greased shallow 3-qt. baking dish. Top with beef mixture and spaghetti sauce (dish will be full). Cover and bake at 350° for 45 minutes. Sprinkle with remaining mozzarella cheese. Bake, uncovered, 15 minutes longer or until bubbly and cheese is melted. Let stand for 10 minutes before serving. Freeze option: Sprinkle casserole with remaining mozzarella cheese. Cover and freeze unbaked casserole. To use, partially thaw in refrigerator overnight. Remove from refrigerator 30 minutes before baking. Preheat oven to 350°. Bake casserole as directed, increasing time as necessary to heat through and for a thermometer inserted in center to read 165°. Yield: 6-8 servings.