01 - Preheat the oven to 425°F (220°C). 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 the eggs with milk in the second; and in the third, combine the breadcrumbs, grated Parmesan, dried oregano, garlic powder, salt, and black pepper.
04 - Dredge each eggplant slice in the flour, shaking off any excess. Dip into the egg mixture, allowing the surplus to drip off. Press firmly into the seasoned breadcrumb mixture, coating both sides evenly.
05 - Place the coated eggplant slices in a single layer on the prepared baking sheets. Drizzle or spray the tops lightly with olive oil to promote even browning.
06 - Bake on the center rack for 15 minutes. Carefully flip each slice and continue baking for an additional 15 minutes, or until both sides are deeply golden brown and crispy.
07 - Remove from the oven and serve immediately while hot and crunchy. Pair with warm marinara sauce for dipping, or use as a base for eggplant parmesan.