01 - Preheat oven to 430°F and place a large roasting tray inside to heat up.
02 - Place peeled and cut potatoes in a large saucepan. Cover with cold water and add 1 tbsp salt.
03 - Bring to a boil, then simmer for 8-10 minutes until edges begin to soften but potatoes are not cooked through.
04 - Drain potatoes well and let steam dry for 2 minutes. Return to pan and gently shake to roughen the edges.
05 - Carefully pour hot oil or fat into potatoes, tossing to coat evenly.
06 - Remove hot roasting tray from oven and carefully tip potatoes into it, spreading in single layer. Add garlic and herbs if using.
07 - Roast for 20 minutes, then turn potatoes. Roast for another 20-25 minutes, turning once more if needed, until golden brown and crispy.
08 - Season with sea salt flakes and black pepper. Serve immediately.