3: Gather the dough into a thick block, wrap in plastic film, and refrigerate for 1 hour. Note: This dough can be made the day before.
4: Preheat the oven to 390°F (200°C). Roll out the dough quite thinly (ideally, 2-3 mm or a bare 1/8 inch).
5: Cut into small rectangles...
6: ...and arrange on a baking sheet. Though it is not essential, at this stage, you can sprinkle a little grated parmesan over the crackers, if you wish.
7: Bake for about 20 minutes. Do watch for the biscuits browning. You will probably need to turn the tray back to front towards the end of cooking.