Preheat oven to 350. Prepare a 13"x9" pan with cooking spray; set aside. In a mixing bowl, combine cottage cheese, eggs, and parmesan cheese; set aside. In another mixing bowl, combine cooked pasta, pasta sauce, and salt. Spoon half of the pasta mixture into prepared pan; evenly top with cheese mixture, then remaining pasta mixture. Sprinkle with mozzarella cheese. Bake for 30 minutes, or until heated through.