Pack your pitted prunes into a jar. Make a sugar syrup with 110 g of sugar and 120 ml of water, the zest of an orange and a small stick of cinnamon and boil for 5 mins. Cool and pour over the prunes, and then top up with brandy. Seal the jar and store in a cool, dark place. The longer you leave them the better they will be...but if you can’t wait, overnight will do!