Preheat oven to 180 degrees Celsius. Put all ingredients apart from crystallised ginger in a food processor and process until just combined- add more rice flour if dough is too sticky. Add the ginger and pulse to combine
Roll dough out to 3mm thick, then cut into desired shapes. Arrange on a large lined oven tray, bake for 15 minutes or until golden and cooked. Remove and set aside to cool completely.