Scrub & peel potatoes if you like. Quarter them & place in a pot. Cover with water. Bring to a boil & remove from heat. Heat 2 tb oil in a roasting pan. Add onions & fry quickly for a couple of minutes. Baste each potato well. Half fill the pan with water that cooked the potatoes. Sprinkle with salt & pepper. Cover & roast at 180ºC for 45 minutes. Remove the lid & roast for a further 15 minutes or until the water has evaporated. Serve with your favourite roast. Adapted by Mark Satterly from a traditional recipe