Prepare three shallow plates: one with plain flour, one with 2 whisked eggs, and one with panko breadcrumbs.
Dredge each chilled patty in flour, ensuring all sides are fully coated.
Dip into the beaten egg, letting the excess drip off.
Press into the panko breadcrumbs, turning and pressing gently to ensure all sides are evenly coated.
Heat a shallow layer of oil in a frying pan over medium-high heat.
Fry each patty for 4-5 minutes per side until golden brown and fully cooked through.
Transfer to a paper towel-lined plate to drain.