Pre-heat the oven to 220C/425F/gas mark 7.
Begin by unrolling the packet of pastry, leaving it on the cellophane, then just cut out 28 2in/5cm discs and arrange them on the baking tray. Next, using the 1 1/2in /4cm cutter, press this into the centre of each disc, making an incision to just three-quarters of the way into the pastry (but be careful not go right through).
Now brush the edge of each disc with a little milk, and then pile about a teaspoonful of mincemeat into the centre of each disc. Arrange three almonds on half the mince pies and three cranberries on the rest, then dust the nuts and cranberries with a little caster sugar.
Bake them on a high shelf in the top part of the oven for 10 minutes, then remove them to a wire cooling tray. Serve warm, dusted with icing sugar.