put your potatoes in a pan of boiling water for 15-20 minutes. they need to be soft, but not so soft that they’re falling apart! drain them and keep them to the side.
get a baking tray and pour some oil in it, enough to cover the bottom of the tray. when i do this i line the tray with tin foil first to save on washing up! put the tray in the oven at 200 degrees for 5 minutes. once done, take out the tray and put the potatoes into it, rolling them over to coat them in the oil. be very careful though as the oil will spit and 