Roast Potatoes

Cut 1.5kg peeled potatoes (maris piper or king edwards)into even-sized chunks.Simmer for 5 mins.Drain,then return to pan.Cover the pan and shake to roughen up edges. Heat 100ml oil in a roasting tin in the oven for a few mins at 190c/170c fan/gas 5.Add the potatoes,turning them over in fat,and cook for 30 mins.When the turkey comes out oven to rest,turn oven up to 220c/200c fan/gas 7 and cook for 30 mins until crisp and golden on the outside and tender in the middle.Sprinkle with sea salt before serving.