Preheat the oven to 425°F (220°C) and line a baking sheet with parchment paper for easy cleanup.
Slice the eggplants into ½-inch thick rounds, sprinkle both sides with salt, and let them sit for about 10 minutes to draw out moisture. Rinse the rounds under cold water and pat dry with paper towels.
In a shallow bowl, place the flour. In another bowl, whisk the eggs. In a third bowl, combine the breadcrumbs, Parmesan cheese, garlic powder, onion powder, oregano, salt, and black pepper.
Dredge each eggplant slice in flour, shaking off excess. Dip into the beaten eggs, and then coat with the breadcrumb mixture, pressing gently to adhere.
Arrange the coated eggplant slices in a single layer on the prepared baking sheet. Lightly spray or drizzle olive oil over the top.
Bake in the preheated oven for about 25-30 minutes, flipping halfway through for even cooking, until the eggplants are golden brown and crispy.
Remove from the oven and let them cool for a few minutes before serving.