The most important thing to remember for perfect potatoes is not to roast them too long in advance as they lose their crunch if you keep them waiting.
Start by par-boiling the peeled potatoes for approx. 5-6 minutes, depending on size.
Drain well and set aside.
Set oven to Gas Mark 6, 200°C (400°F).
Heat some oil or fat from the turkey on the baking tray.
Place the potatoes on the hot tray. Sprinkle with salt and roast for 40-50 minutes.
Shallots, roasted with the potatoes, are also delicious.