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 flour, whisk the eggs and milk together in the second, and combine the breadcrumbs, Parmesan cheese, dried oregano, garlic powder, salt, and black pepper in the third.
04 - Working one at a time, dredge each eggplant slice in the flour, shaking off any excess. Dip into the egg wash, then press firmly into the breadcrumb mixture, coating both sides evenly.
05 - Place the breaded slices in a single layer on the prepared baking sheets. Drizzle or spray the tops lightly with olive oil.
06 - Bake for 15 minutes, then carefully flip each slice. Continue baking for an additional 15 minutes until both sides are golden brown and crunchy.
07 - Serve immediately while hot, accompanied by marinara sauce for dipping, or as a side dish or appetizer.