Preheat the oven: preheat the oven to 180°C / 350-375°F / Gas Mark 4-5.
Potatoes: peel the potatoes, discard the skins and then use a knife and chopping board to cut them in half and half again.
Par boil: fill a saucepan with water, add salt to water and bring to the boil. Cook the potatoes for 5 - 10 mins, they will be soft on the outside but still firm when pierced with a skewer. Note 4
Duck fat: pour duck fat into the base of a large baking dish, place this in the oven and allow to heat for 5 mins. Use oven mits to remove the baking dish from the oven, place on a heat proof service then use tongs to place the potatoes one by one into the duck fat in a flat layer.
Roast the potatoes: using oven mits again, place the baking dish back into the oven and bake for 20 mins.
Rotate: remove from the oven again using oven mits, place on a heat proof surface, and use tongs to rotate each potato in the duck fat so that the other sides are coated. Return the baking dish to the oven for another 25 mins.
Remove from oven: use oven mits to remove the pan from the oven when the potatoes are golden brown and crunchy. Use tongs to remove each potato from the remaining duck fat and let drain.
Serve and enjoy: Sprinkle with salt and serve with gravy or your favourite sauce!