Preheat the oven to 180 °C. Butter a baking tray. Mix all the ingredients together and roll out thinly on the prepared baking tray. Mark into squares. Bake for 20–25 minutes until brown and crispy. Allow to cool in the switched-off oven. Break into pieces and serve. Store what you don’t use in an airtight container. Yields a platter for 6–8 guests at about 15 g carbs for the entire tray.