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. For best results, lightly salt the slices 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 and milk together in the second, and combine the breadcrumbs, Parmesan cheese, oregano, garlic powder, salt, and black pepper in the third.
04 - Working one at a time, dredge each eggplant slice through the flour, shaking off excess. Dip into the egg mixture, then press firmly into the seasoned 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 another 15 minutes until both sides are golden brown and crispy.
07 - Serve immediately while hot and crispy, paired with warm marinara sauce for dipping if desired.