01 - Gently pound each beef escalope between two sheets of plastic wrap until they are approximately 1/4 inch thick.
02 - Arrange three shallow bowls: fill one with flour mixed with salt and pepper, a second with beaten eggs whisked with milk, and a third with panko breadcrumbs combined with grated Parmesan.
03 - Dredge each escalope first in flour, shaking off excess, then dip in the egg mixture, and finally press into the breadcrumb-Parmesan mixture for an even coating on all sides.
04 - Warm the vegetable oil and butter in a large frying pan over medium-high heat until hot.
05 - Place the coated escalopes in the hot pan and fry each for 2 to 3 minutes per side, turning once, until the coating is golden brown and crisp. Fry in batches to avoid overcrowding.
06 - Transfer the cooked escalopes to a plate lined with paper towels to drain excess oil and keep warm.
07 - Arrange escalopes on serving plates. Garnish with chopped parsley and lemon wedges. Serve immediately.