Note 1: Why use a tray insert for air fryer roast potatoes?
Roasting potatoes in the oven requires you to roast the potatoes in a roasting tray with fat in. The potatoes are sitting in the hot fat. This is what helps to give the potatoes that ‘crunchy shell’.If you try to roast potatoes in an air fryer in the regular basket (with holes in) any excess fat you add will drain through the holes, so the potatoes aren’t in contact with the hot fat. They’ll only have the small amount of fat you poured on coating the skin.This will result in roast potatoes that are browned, with only a very thin skin of crispness that’s also a little chewy.If they’re sitting in the hot fat, you’ll get a thicker skin of crunch, as the hot oil absorbs deeper into the skin.
Find it online: http://allguiderecipes.info/air-fryer-roasted-potatoes-3/