Cut the aubergine into eight thick slices, salt them lightly and leave them for 10 minutes. Then pat them dry and brush with olive oil.
Cook the slices in the basket at 200 °C for 8 minutes without preheating, turning after 4 minutes.
Stir the passata with the crushed garlic and oregano. Mix the ricotta with the egg and half the hard cheese.
In a small ovenproof dish, stack the aubergine slices alternately with the tomato sauce and ricotta to make four stacks, and sprinkle the rest of the hard cheese over the top.
Cook the dish at 180 °C for 8 minutes, until the cheese is browned.
Garnish the stacks with basil and serve hot.
Good to know
Everything you love about a bake, but in a quarter of an hour and without switching on the oven. The aubergines turn soft in the air fryer and still pick up roasted flavours.