01 - Preheat oven to 400°F. Line two baking sheets with parchment paper and lightly coat with olive oil or spray.
02 - Arrange eggplant slices on a rack or paper towels, sprinkle both sides with salt, and let rest for 20 minutes to remove moisture and bitterness. Pat slices thoroughly dry.
03 - Beat eggs with milk in a shallow bowl. In a separate bowl, combine panko, grated Parmesan, oregano, basil, garlic powder, salt, and pepper.
04 - Dip each eggplant slice into the egg mixture, then coat evenly with the breadcrumb mixture, pressing to adhere. Arrange on prepared baking sheets.
05 - Lightly drizzle or spray eggplant slices with olive oil. Bake for 20 minutes, flip slices, then bake an additional 10 to 15 minutes until golden and crisp.
06 - Reduce oven temperature to 375°F. Spread 1/2 cup marinara sauce in a 9x13-inch baking dish. Layer half of the baked eggplant, followed by half of the remaining marinara and half the mozzarella cheese. Repeat layers, finishing with marinara, mozzarella, and topping with 1/4 cup Parmesan cheese.
07 - Bake uncovered for 20 to 25 minutes until cheese is melted and bubbling. Let rest for 5 minutes, garnish with fresh basil if desired, and serve.