For Roast potatoes

For Roast potatoes cut peeled potatoes into suitably-sized pieces, par-boil in water for 5–10 minutes until you can pierce them with a knife, then drain; meanwhile, preheat the oven to 200°C/400°F/gas mark 6 and place a roasting tin (pan), with a light swirl of olive oil, into the oven. Add the potatoes to the hot tin, turn them quickly to coat in the oil, and roast for about 45 minutes or until crisp and golden, turning them once or twice during cooking.