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 heat and simmer for 8-10 minutes until the edges begin to soften but the potatoes are not cooked through.
04 - Drain the potatoes well in a colander and let them steam dry for 2 minutes. Return them to the pan and shake gently to roughen the edges, creating a crispy texture later.
05 - Carefully pour the hot oil or fat into the saucepan with the potatoes. Toss gently to coat evenly.
06 - Remove the hot roasting tray from the oven. Carefully tip the potatoes into the tray, spreading them out in a single layer without overcrowding. Add garlic and herbs if using.
07 - Roast for 20 minutes until the bottoms begin to brown.
08 - Turn the potatoes using a spatula. Roast for another 20-25 minutes, turning once more if needed, until golden brown and crispy all over.
09 - Season immediately with sea salt flakes and freshly ground black pepper. Serve hot while crispy.