Cut the string cheese in half ( which makes 16 pieces) and place in the freezer for 30-45 minutes. Beat egg in a small and set aside. In a separate bowl mix the Parmesan cheese and breadcrumbs and set aside.
Dip 1 string cheese in breadcrumb mixture than in egg mixture and than back in breadcrumb mixture. Repeat this for all the pieces. Place sticks on a greased foil or pan. Return the cheese stick back to the freezer for at LEAST 30-45 minutes ( Do not skip this step because the cheese will melt if they are not frozen).
After the cheese is finished freezing heat oven t0 375 degrees. Spray the cheese lightly with cooking spray and place in the oven. After 4 minutes flip the cheese sticks and continue baking for another 3- minutes or until they are golden. Do not overbake because the cheese will melt. Serve Hot with your favorite marinara sauce. Enjoy!