Preheat the air fryer to 375 F according to manufacturer instructions. (Mine was 375 F for 5 minutes) Cosori 5.8 quart. You could also use something like a Ninja Foodi air fryer.)
Place potato halves in a large bowl and season the potatoes with garlic, onion powder and salt, pepper and drizzle with oil. Spray the air fryer tray lightly with oil before adding the potatoes.
Air fry potatoes at 375 F for 15 minutes, turning the potatoes halfway through. Within the last 5 minutes pause the air fryer and add parmesan cheese on top of each potato. Continue to air fry.
Add more parmesan cheese and fresh herbs (parsley and thyme work the best!) on top before serving.