2) Place the dough on a lightly floured board and roll into a 30cm long log. Wrap the log in cling film and place in the freezer for 30 minutes to harden. Meanwhile, preheat the oven to 180C/Gas mark 4.
3) Take the log out of the freezer and remove the cling film. Cut the log crosswise into 0.5 to 1cm thick slices and place the slices on a flat baking tray. Bake for 22 minutes.