01 - Preheat oven to 430°F. Place a large roasting tray inside to heat up while preparing potatoes.
02 - Place peeled and cut potato chunks in a large saucepan. Cover completely with cold water and add 1 tablespoon salt.
03 - Bring water to a boil over high heat, then reduce to medium heat and simmer for 8-10 minutes until edges begin to soften but centers remain firm.
04 - Drain potatoes thoroughly in a colander and let steam dry for 2 minutes. Return to the saucepan and shake vigorously to roughen the surfaces, creating crispy edges.
05 - Pour hot oil or fat over the potatoes in the saucepan. Gently toss until evenly coated.
06 - Carefully remove the hot roasting tray from the oven. Transfer potatoes in a single layer, spreading them evenly. Add crushed garlic and herb sprigs if desired.
07 - Roast for 20 minutes until bottoms begin to brown.
08 - Turn potatoes carefully. Continue roasting for 20-25 additional minutes, turning once more if needed, until deep golden brown and crispy all over.
09 - Remove from oven. Season generously with sea salt flakes and freshly ground black pepper. Serve immediately while hot and crispy.