Remove string cheese from wrappers and cut half, making 24 pieces. Place cheese in a ziplock bag and freeze cheese until frozen ( at least 1 hour)
In one bowl place flour, in second bowl place your beaten egg, and in third bowl place bread crumbs, panko and all purpose seasoning.
Line a large baking sheet with aluminum foil and spray with olive oil cooking spray.
Start your mozzarella stick assembly line. One at a time, first dip frozen cheese stick in flour, then into egg, followed by bread crumbs. Place on baking sheet and repeat until all cheese sticks are done.
NOTE: If you are making these ahead of time for a party, you can place baking sheet in freezer until ready to bake.
When ready to bake, preheat oven to 400 degrees F.
Bake for about 5 minutes, then turn sticks over and continue to bake an additional 5-6 minutes or until golden brown and cheese just starts to seep out. (Drool....)
Serve hot with marinara sauce or Ranch dressing for dipping.