01 - Preheat oven to 430°F. Place a large roasting tray inside to heat up while preparing potatoes.
02 - Place peeled and cut potatoes in a large saucepan. Cover with cold water and add 1 tablespoon salt.
03 - Bring water to a boil over high heat, then reduce to medium-low. Simmer for 8–10 minutes until edges begin to soften but centers remain firm.
04 - Drain potatoes thoroughly in a colander. Let steam dry for 2 minutes. Return to pan and shake vigorously to roughen the surface edges.
05 - Carefully pour hot oil or duck fat over potatoes. Gently toss to coat evenly without breaking pieces.
06 - Remove heated roasting tray from oven. Carefully transfer potatoes, spreading in a single layer. Add crushed garlic and herb sprigs if desired.
07 - Roast at 430°F for 20 minutes until beginning to color.
08 - Turn potatoes and roast an additional 20–25 minutes until deep golden brown and crispy. Turn once more halfway through for even browning.
09 - Remove from oven. Season immediately with sea salt flakes and black pepper. Serve hot.