In a bowl, toss together the eggplant and vegetable oil.
Season with salt and pepper, and toss to coat evenly.
Preheat the air fryer to 400°F.
Transfer the seasoned eggplant to the air fryer basket and cook for about 15 minutes, shaking the basket every 5 minutes, until the eggplant is caramelized and tender.
Meanwhile, in a small bowl, whisk together the yogurt, harissa paste, and grated garlic.
Spread the harissa yogurt mixture onto a serving plate.
Once the eggplant is cooked, pile it over the yogurt mixture on the serving plate.
Drizzle the honey or agave syrup over the warm eggplant just before serving.