In a large skillet, cook the panko, while constantly stirring, over medium heat until golden brown. Remove to a bowl and allow to cool.
Line a large baking sheet with foil. Top with oven-safe wire racks.
Cut the mozzarella sticks in half crosswise.
In a wide bowl, add the flour and season with salt and pepper.
In another bowl, beat together the egg and milk.
Mix the Parmesan, Italian seasoning, and garlic powder into the cooled panko in the third bowl.
Dip a halved mozzarella stick into the flour and thoroughly coat. Then coat in the egg mixture, allowing the excess to drip off before completely covering in the panko, including the ends.
Place on the wire rack over the baking sheet and repeat with remaining cheese sticks, placing them at least 1 inch (2.5 centimeters) apart.
Freeze the mozzarella sticks on the baking sheet for at least 1 hour.
Preheat oven to 400˚F (200˚C). Bake the mozzarella sticks in the preheated oven until heated through 8-10 minutes.
Allow to cool 1-2 minutes before serving warm with marinara sauce and a sprinkling of parsley.