Pat the cheese cubes dry with paper towels. Set up a breading station with three bowls: one with flour, one with beaten eggs, and one with a mixture of panko, Parmesan, garlic powder, oregano, salt, and pepper.

Dip each cheese cube into the flour, then egg, then breadcrumb mixture, pressing to adhere. Repeat the egg and breadcrumb coating once more for extra crispiness.

Place breaded cheese bites on a tray and freeze for 30 minutes to prevent melting during frying.

Heat about 2 inches of vegetable oil in a deep skillet or pot to 350°F (175°C). Fry cheese bites in batches for 1–2 minutes until golden and crisp.

Remove with a slotted spoon and drain on paper towels. Serve hot with marinara sauce for dipping.