Put all the ingredients except the eggwash and sesame seeds into a bowl and mix well, then, using your hands, knead for 5 minutes until you have a pliable dough.
Preheat the oven to 220°C/425°F/gas mark 7.
Line a baking tray.
Tip the dough out onto a lightly floured surface and, using a rolling pin, roll out until it is wafer thin – about 2–3 mm/1⁄8 inch thick.
Use plenty of flour, but brush it off afterwards.
Cut the dough into random shapes, place on three baking trays, brush each one with eggwash and coat the top with sesame seeds.
Bake for 20–30 minutes until dark brown, then serve immediately.