Prepare the Eggplant: Wash and dry the eggplant. Slice it into rounds about ½ inch thick. Arrange the slices on a plate or baking sheet, sprinkle lightly with salt, and let them sit for 10–15 minutes. Pat away the moisture with paper towels.
Set Up the Breading Station: Place the flour in one shallow bowl. In a second bowl, whisk the eggs with water. In a third bowl, combine the breadcrumbs, ¼ cup Parmesan, garlic powder, oregano, and black pepper.
Coat the Eggplant: Dip each eggplant slice into the flour, shaking off the excess. Next, coat it in the egg mixture, then press it into the breadcrumb mixture until both sides are evenly covered.
Preheat the Air Fryer: Preheat the air fryer to 375°F for about 3 minutes, if your model requires preheating. Lightly spray the air fryer basket with olive oil.
Air Fry Until Crispy: Arrange the coated eggplant slices in a single layer, leaving space between them. Lightly spray the tops with olive oil. Air fry at 375°F for 8–10 minutes, flipping halfway through, until golden and tender. Cook in batches if needed.
Add the Sauce and Cheese: Spoon a small amount of marinara sauce over each cooked eggplant slice. Sprinkle with shredded mozzarella and the remaining Parmesan cheese.
Melt the Cheese: Return the topped eggplant slices to the air fryer. Cook at 350°F for another 2–3 minutes, until the cheese melts and becomes bubbly.
Garnish and Serve: Carefully remove the eggplant Parmesan from the basket. Sprinkle with fresh basil and serve warm with extra marinara sauce if desired.