Cut each mozzarella string cheese stick in half to make 24 pieces. Place them on a tray and freeze for at least 30 minutes to firm up.

Set up a breading station: Place flour in a shallow bowl. In another bowl, whisk eggs and water. In a third bowl, mix both breadcrumbs, garlic powder, oregano, salt, and pepper.

Coat each cheese stick: First roll in flour, shaking off excess. Dip in egg wash, then coat thoroughly with breadcrumb mixture. Place on a plate.

Freeze again: Place breaded mozzarella sticks on a tray and freeze for another 15 minutes to help coating adhere.

Heat oil: Pour vegetable oil into a deep pan until it's about 2 inches deep. Heat to 375°F (190°C) over medium heat.

Fry in batches: Carefully add 4-5 mozzarella sticks at a time. Fry for about 30-45 seconds until golden brown, turning once. Remove with a slotted spoon and drain on paper towels.

Serve immediately with warm marinara sauce for dipping while cheese is still melted inside.