Peel the potatoes and slice them into moderately thin rounds. You can use a mandoline slicer if you have one. Place the potato slices in the air fryer basket and press the garlic clove over them.

Mix the milk and heavy cream with the salt, pepper, and nutmeg, then pour over the potatoes. Cook for 30 minutes at 356°F (180°C). Stir halfway through.

Then cook for another 20 minutes at 320°F (160°C).