Preheat the air fryer to 370°F (188°C).
Arrange the eggplant rounds in a colander and lightly sprinkle both sides with sea salt. Let them rest for about 30 minutes. This helps draw out excess moisture.
Pat the eggplant slices thoroughly dry with clean paper towels.
Crack the egg into a shallow bowl and whisk until smooth.
In a separate shallow bowl or rimmed plate, combine the panko breadcrumbs, almond flour, Parmesan cheese, ½ teaspoon sea salt, and several grinds of black pepper.
Dip each eggplant slice into the beaten egg, allowing excess egg to drip away.
Press both sides into the breadcrumb mixture until evenly coated.
Arrange the breaded eggplant on a plate and lightly drizzle or spray both sides with extra-virgin olive oil.
Place the slices in the air fryer basket in a single layer. Leave a little space between them so the hot air can circulate properly.
Air fry for 17 to 20 minutes, flipping halfway through, until deeply golden and crispy. Cook in batches if necessary.
Serve your Air Fryer Eggplant immediately while the coating is hot and crunchy. Enjoy it as a snack with tomato sauce or pair it with pasta, cashew cream, fresh herbs, and red pepper flakes for a complete meal.