Heat oven to 180C/fan 160C/gas 4. On a lightly floured work surface, roll the pastry out to a 2-3mm thickness. Using a 9-10cm fluted cutter, stamp out discs from the pastry. Re-roll any trimmings and stamp out more discs until the pastry is used up. Line two 8-hole muffin tins with the pastry discs, then fill each pastry shell with 1 heaped tsp mincemeat and spread out to smooth. Can be frozen, uncooked, in trays for up to 1 month.