1.Process flour, bran, oats, soda and butter until crumbly; add sugar, egg and enough of the water to make a firm dough. Knead dough on a lightly floured surface until smooth; cover, refrigerate for 30 minutes.
2.Preheat oven to 180°C (160°C fan). Grease oven trays; line trays with baking paper.
3.Divide dough in half; roll each half between sheets of baking paper into a 5mm thickness. Cut dough into 7cm rounds; place on trays 2cm apart. Bake about 15 minutes. Stand biscuits on trays for 5 minutes before transfering to wire racks to cool.
Unprocessed bran is the coarse outer husk of cereal grains, and can be found in health food stores and supermarkets. Use traditional rolled oats for this recipe, not the instant variety.Note