01 - Preheat oven to 425°F. Line two baking sheets with parchment paper and lightly coat with olive oil spray.
02 - Wash eggplants thoroughly and cut into 1/2-inch thick rounds. Optionally sprinkle slices lightly with salt and let 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 eggs and milk together in the second, and combine breadcrumbs, Parmesan cheese, oregano, garlic powder, salt, and black pepper in the third.
04 - Dredge each eggplant round in flour, shaking off excess. Dip into the egg wash, then press firmly into the breadcrumb mixture, coating both sides evenly.
05 - Place breaded slices in a single layer on prepared baking sheets. Lightly drizzle or spray the tops with olive oil.
06 - Bake for 15 minutes, then carefully flip each slice. Continue baking for another 15 minutes until both sides are golden brown and crisp.
07 - Serve immediately while hot and crispy, paired with warm marinara sauce for dipping if desired.