01 - Line a baking sheet with parchment paper for the freezing stage.
02 - Slice mozzarella cheese into stick shapes if not pre-cut into uniform pieces.
03 - Arrange sticks in a single layer on the baking sheet and freeze for at least 1 hour until very firm to prevent melting during baking.
04 - Preheat oven to 425°F. Place a wire rack on a second baking sheet and lightly coat with olive oil spray.
05 - Prepare three shallow bowls: Bowl 1 with flour, Bowl 2 with whisked eggs and milk combined, Bowl 3 with panko, Italian breadcrumbs, garlic powder, oregano, basil, salt, and pepper mixed together.
06 - Working quickly with a few sticks at a time, coat each frozen mozzarella stick in flour (shake off excess), dip in egg mixture, then roll in breadcrumb mixture, pressing firmly to adhere. For extra crunch, repeat egg and breadcrumb coating once more.
07 - Place breaded sticks on the prepared wire rack, spacing them apart to allow air circulation for even crisping.
08 - Generously spray the tops with olive oil spray to promote golden browning.
09 - Bake for 8-10 minutes, turning halfway and spraying the other side with oil, until golden and crisp. Watch closely during the final minutes to prevent cheese from oozing out.
10 - Let cool for 2 minutes to set the coating before serving warm with marinara sauce.