Cut the aubergine into 1.5cm disks and season both sides with salt and freshly ground pepper.
Set up 3 shallow dishes, one with the flour, seasoned with a pinch of salt and pepper, one with the lightly beaten egg, mixed with 1 tsp water, and one with the breadcrumbs.
Dip the aubergine in the flour, then the egg and then the breadcrumbs covering the aubergine disk to form an even coating.
Place the prepared aubergine in the air fryer basket onto a lightly oiled rack. Select Air Fry and set the temperature to 188°C and the time to 12 minutes. Ignore when prompted to Add Food as it will already be inside and flip the aubergine over when prompted to Turn Food.
While the aubergine cooks make the slaw by combining the shredded cabbage with salt, pepper, mayonnaise, chilli flakes and garlic in a bowl.
To plate up, smear some mayonnaise on the base of your roll, then top with your aubergine and slaw and serve immediately.