01 - Preheat the oven to 430°F. Place a large roasting tray inside to heat up while you prepare the potatoes.
02 - Place the peeled and cut potatoes in a large saucepan. Cover with cold water and add 1 tablespoon salt.
03 - Bring to a boil over high heat, then reduce to medium-low heat and simmer for 8 to 10 minutes until the edges begin to soften but the centers remain firm.
04 - Drain the potatoes thoroughly in a colander and let steam dry for 2 minutes. Return to the saucepan and shake vigorously to roughen the exterior edges.
05 - Carefully pour the hot oil or fat over the potatoes. Gently toss to coat evenly, ensuring all surfaces are covered.
06 - Remove the hot roasting tray from the oven. Carefully tip the potatoes into the tray, spreading them in a single layer without overcrowding. Add garlic cloves and herb sprigs if using.
07 - Roast for 20 minutes until the bottoms begin to turn golden.
08 - Turn the potatoes using a spatula. Roast for an additional 20 to 25 minutes, turning once more halfway through, until deeply golden brown and crispy on all sides.
09 - Remove from oven. Season generously with sea salt flakes and freshly ground black pepper. Serve immediately while hot and crispy.