01 - Preheat oven to 400°F. Line two baking sheets with parchment paper and lightly oil or spray.
02 - Place eggplant slices in a colander, sprinkle both sides with kosher salt, and let rest for 20 minutes to draw out moisture. Pat dry with paper towels.
03 - Arrange flour in one shallow bowl. In a second bowl, whisk eggs with milk. In a third bowl, combine panko breadcrumbs, 1/2 cup Parmesan, oregano, garlic powder, and black pepper.
04 - Dredge each eggplant slice in flour, shake off excess, dip in egg mixture, then coat thoroughly in panko mixture. Place coated slices on prepared baking sheets.
05 - Lightly spray or brush eggplant slices with olive oil. Bake for 20 minutes, flipping halfway through, until golden and crisp.
06 - Lower oven temperature to 375°F.
07 - Spread 1 cup marinara sauce in a 9x13-inch baking dish. Layer half the baked eggplant slices over sauce. Top with half the remaining marinara, 1 cup mozzarella, and 1/4 cup Parmesan. Repeat layers with the rest of the eggplant, sauce, mozzarella, and Parmesan.
08 - Bake uncovered for 25 minutes until cheese is bubbly and golden. Remove from oven and let cool for 10 minutes.
09 - Sprinkle chopped fresh basil over the top before serving.