Take your potatoes and peel them. Next cut each potato into three even pieces and place them into a pot. Fill the pot with water until the potatoes are just covered. Place on a medium-high heat and bring to a boil.
Preheat the oven to 400℉/200℃/Gas Mark 6.
Once the pot has been brought to a boil, reduce the heat to medium, leave uncovered and boil the potatoes for about 2 minutes. Once the 2 minutes is up, remove from the heat and drain through a colander.
Return the potatoes to the pot and shake the potatoes. As you shake the potatoes, they will begin to flake on the sides which is exactly what you want. When all of potatoes are flaked place them onto an oven sheet lined with parchment paper.
Evenly place the potatoes so that they are in a single layer on the oven sheet. Drizzle the olive oil (or melted goose/duck fat) on top of each of the potatoes. Use a silicone pastry brush to spread the olive oil on top of each potato.
Next, season with black pepper and salt.
Place into the oven and bake for 1 hour.