Pile the flour onto a pastry board and make a well in the center. Add all the other ingredients into the well. Knead the mixture into a smooth ball, then place it in a large bowl, cover with a clean towel, and let it rise for one hour.
Roll out the dough to about 1.5 cm thickness and place it in a baking tray, pinching the edges slightly. Score a criss-cross pattern on the surface with a knife, then brush the top with the beaten egg.
Let the dough rise in the tray for another hour.
Bake in a preheated oven at 200°C (390°F) for about 45 minutes, until golden brown.