01 - Preheat the oven to 425°F. Line two baking sheets with parchment paper and lightly coat with olive oil spray.
02 - Wash the eggplants thoroughly and slice into 1/2-inch thick rounds. Optionally, sprinkle the slices lightly with salt and let them rest for 15 minutes to draw out excess moisture, then pat dry with paper towels.
03 - Arrange three shallow bowls: fill the first with all-purpose flour, whisk together the eggs and milk in the second, and combine the breadcrumbs, grated Parmesan, dried oregano, garlic powder, salt, and black pepper in the third.
04 - Dredge each eggplant slice in the flour, shaking off any excess. Dip into the egg mixture to coat evenly, then press firmly into the seasoned breadcrumb mixture, ensuring full coverage on both sides.
05 - Place the breaded slices in a single layer on the prepared baking sheets. Lightly drizzle or spray the tops with olive oil to promote even browning.
06 - Bake for 15 minutes, then carefully flip each slice and continue baking for an additional 15 minutes until golden brown and crunchy on both sides.
07 - Remove from the oven and serve immediately as a side dish, appetizer, or alongside warm marinara sauce for dipping.