When the dough is ready, line a large baking tray with baking paper and pre-heat the oven to 190℃ (374℉).
On a lightly floured surface, roll out the dough into a large rectangle shape. It doesn't matter too much about specifics, but make sure your dough is fairly thin and has an even thickness throughout (see note 5)
Down the centre of the rolled out dough, spread your cranberry jam.
Next, cover the jam with chocolate chunks, making sure to keep them in one layer (not on top of each other) so that they can melt.
Cut strips, slightly diagonally, down either side of the jam/chocolate.
Carefully, alternating between one side and the next, place each strip over the jam/chocolate in a criss-cross pattern. Tuck both ends underneath themselves.
When ready, carefully move onto the prepared baking tray.
Beat the egg and liberally wash over the dough.
Bake for around 15 minutes, until the bread is golden (don't over-bake it).
Leave to cool for around 30 minutes and then sprinkle with icing sugar. Slice and eat it immediately. Enjoy!