01 - Gently pound each beef escalope between two sheets of plastic wrap until approximately 0.2 inches thick for even cooking.
02 - Arrange three shallow dishes: first with flour seasoned with salt and pepper, second with beaten eggs whisked with milk, and third with panko breadcrumbs mixed with grated Parmesan.
03 - Dredge each escalope in flour, shaking off excess, then dip into egg mixture, and finally coat thoroughly with breadcrumb-Parmesan blend. Press gently to ensure adhesion.
04 - Combine vegetable oil and butter in a large frying pan over medium-high heat until shimmering.
05 - Cook each escalope for 2-3 minutes per side until golden brown and crispy. Fry in batches to prevent overcrowding and maintain oil temperature.
06 - Transfer cooked escalopes to paper towels to drain excess oil. Keep warm in a low oven if necessary while finishing remaining batches.
07 - Arrange on serving plates immediately, sprinkled with fresh chopped parsley and accompanied by lemon wedges for squeezing.