01 - Preheat oven to 400°F. Lightly grease a large baking dish.
02 - Place chicken breasts between two sheets of plastic wrap and pound to an even ½-inch thickness.
03 - Place flour in one shallow bowl. In a second bowl, whisk eggs with milk. In a third bowl, combine breadcrumbs, ½ cup Parmesan, oregano, garlic powder, salt, and pepper.
04 - Dredge each chicken breast in flour, dip in egg mixture, then coat thoroughly with the breadcrumb mixture.
05 - Heat olive oil in a large skillet over medium-high heat. Fry chicken breasts for 2–3 minutes per side until golden and crisp. Transfer to a paper towel-lined plate.
06 - In a saucepan, heat 1 tablespoon olive oil over medium heat. Add minced garlic and sauté for 30 seconds. Pour in marinara sauce, dried basil, and sugar. Simmer for 5 minutes.
07 - Spread 1 cup of sauce in the bottom of the baking dish. Place fried chicken breasts on top. Spoon remaining sauce over each piece. Sprinkle evenly with mozzarella and remaining ½ cup Parmesan.
08 - Bake uncovered for 18–20 minutes, or until cheese is bubbling and chicken reaches an internal temperature of 165°F.
09 - Garnish with fresh basil or parsley. Serve immediately.