These potatoes can be frozen. Let cool completely, then wrap each half individually in foil (minus the scattering of cheese). Label and freeze until required. Preheat your oven to 220C/ 425F/ GM7. Unwrap the potatoes , place on a baking sheet, cover with foil and bake for 40 minutes. Remove the foil, scatter with cheese and bake for a further 20 minutes. Alternatively, defrost completely, scatter with cheese and bake for 25-30 minutes at 200C/ 400F/ GM6