Place the flour, dough, oil, yeast, milk, salt and water in the bowl of an electric mixer and, with the dough hook, mix for 6–8 minutes, until smooth and elastic. Cover the dough and leave to prove for just 10 minutes. Then divide it into 12 balls and place on a floured baking tray. The buns will spread, so be sure to allow a little room between each one. Cover loosely with cling film and prove in a warm place for 2 hours.