01 - Preheat oven to 425°F. Line a baking sheet with parchment paper or lightly grease it.
02 - Place chicken breasts between plastic wrap sheets and pound to 1/2-inch thickness. Season both sides with salt and freshly ground black pepper.
03 - Arrange three shallow bowls: one with flour; one with eggs whisked with milk; and one with panko, Parmesan, Italian herbs, and garlic powder combined.
04 - Dredge each chicken breast in flour, shaking off excess. Dip into egg mixture, then coat fully with breadcrumb mixture, pressing to adhere.
05 - Place breaded chicken on prepared baking sheet. Lightly drizzle or spray tops with olive oil.
06 - Bake for 20 minutes until golden and cooked through, with an internal temperature reaching 165°F.
07 - Remove from oven, spoon marinara evenly over each piece, then top with mozzarella cheese.
08 - Return baking sheet to oven and bake 8 to 10 minutes until cheese melts and is bubbly.
09 - Optionally garnish with fresh basil or parsley and serve hot over pasta if desired.