Freeze-ahead roast potatoes

Method

1. Put the potatoes in a pan of well-salted boiling water and cook at a brisk boil for about for around 8 minutes, until they’re halfway cooked.
2. Drain, leave to steam for a minute, then return to the pan. Add the flour and some salt and toss gently, trying not to break them up. Tip out onto baking tray, leave to cool completely, then freeze.
3. Once ready to cook, heat the oven to 200°C and add the fat, or oil, to your largest baking tray, or two smaller ones – the potatoes must be able to cook in a single layer. Put the tray(s) in the oven for 6-7 minutes until the fat is smoking. Carefully tip the frozen potatoes into the tray, turning them to coat in the hot fat – be careful as the oil may spit.
4. Season and roast in the oven for 60–75 minutes, turning occasionally, until golden and crisp on the outside and fluffy inside.