Step #1 Mix the peel & currants together in a bowl, pour over the brandy & leave them to soak for at least 1 hr.
Step #2 On a lightly floured surface, roll the pastry out to 1/8 inch thick & cut into two 8 inch rounds.
Step #3 Place one pastry round on a wet baking tray & top this with the brandy-soaked current & peel mix; moisten the edge of the pastry with water & cover with the other pastry round then press the edges to seal them together; slice the cake into quarters leaving it together, do not separate the quarters out; decorate the cake with left over pastry trimmings if you wish.
Step #4 Bake the cake for 15 mins in the centre of the oven, pre-heated to 450 F / 230 C / gas mark 8; reduce the heat to 425F F / 220 C /gas mark 7 & bake for a further 20-25 mins, or until crisp & golden brown.
Step #5 Sprinkle top the cake with caster sugar & serve hot or cold.