Preheat the oven to 180°C (375°F/Gas Mark 5). Roll out the pastry on a lightly floured work surface to make a large rectangle, then stamp out 24 x 6cm discs (with a cutter or use a glass) and place in greased muffins tins (of course you can do this in batches).
To make the frangipane, combine all of the ingredients in a bowl and whisk with an electric whisk for about one minute until you achieve a soft paste.
To assemble, add a large teaspoon of mincemeat into each pastry case then top with a tablespoon of the frangipane mixture. Sprinkle over some flaked almonds and transfer to the oven to bake for 25-30 minutes until golden brown. Serve warm or cold with brandy butter or custard.
