Väldigt lätta rostade potatisar

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1. 1
   Heat oven to 200C/180C fan/gas 6. Heat the oil in a large roasting tin in the oven. Cut any larger potatoes in half. Cover the potatoes in cold salted water, bring up to the boil and cook for 2 mins. Drain and steam-dry in a colander for 5 mins, then shake to ruffle up the outsides.
2. 2
   Remove the roasting tin – be really careful as the oil will be hot. Tip in the potatoes and garlic (if using), and use a spoon to turn them so they are all coated in the oil. Sprinkle with sea salt and pepper, and roast for 1 hr 45 mins, turning every 30 mins or so, until really crisp and golden.