Slice the pandoro horizontally into several slices.Place the largest piece on a serving platter. Mix the mascarpone with the lemon juice and zestPaint on the limoncello on each cut layersGenerously apply a thick layer of the cream mixture between the layers. Place the layers back to construct a star tower or a christmas tree, making sure to stagger the star design. (Not all the points are aligned).Sprinkle icing sugar over the cake from a height like a dusting of snow. Finish with some slivers of tangerine peel. Feel free to add any glittery decorations,fresh fruits, pomegranates or anything else you fancy. Get creative. This will look so beautiful and festive on your Christmas table.