Preheat your air fryer to 375°F (190°C).
Slice the eggplant into 1/4-inch rounds and place them in a bowl.
Drizzle olive oil over the slices and toss to coat evenly.
Sprinkle garlic powder, salt, pepper, and Parmesan (if using) over the eggplant. Toss again.
Arrange the eggplant slices in a single layer in the air fryer basket. Don’t overcrowd—do this in batches if needed.
Air fry for 12-15 minutes, flipping halfway through. They're done when golden and crispy.
Serve warm, garnished with chopped parsley and your favorite dip or sauce.