Rinse the potatoes thoroughly, boil with water and salt on 3 or automatic heat 5-6, cook for 15 minutes on 1, peel and cool.
Heat lard in a large frying pan on 2 1/2 or automatic cooking zone 8-9 and roast the potatoes in it until crispy brown on all sides. Dust with powdered sugar at the end to give them a shine.