01 - Preheat oven to 430°F. Place a large roasting tray inside to heat up while preparing the potatoes.
02 - Place peeled and cut potatoes in a large saucepan. Cover with cold water and add 1 tablespoon salt. Bring to a boil, then simmer for 8–10 minutes until edges begin to soften but potatoes are not cooked through.
03 - Drain potatoes well in a colander and let steam dry for 2 minutes. Return to the saucepan and shake vigorously to roughen the edges, creating a fluffy texture.
04 - Carefully pour hot oil or fat over the potatoes. Toss gently to coat evenly, ensuring each piece is lightly covered.
05 - Remove hot roasting tray from oven. Carefully tip potatoes into the tray, spreading in a single layer with space between pieces. Add garlic and herbs if using.
06 - Roast for 20 minutes until the bottoms begin to brown.
07 - Turn potatoes using a spatula. Roast for another 20–25 minutes, turning once more if needed, until golden brown and crispy all over.
08 - Remove from oven. Season with sea salt flakes and freshly ground black pepper. Serve immediately while hot and crispy.