* The original directions call for forming a ball, but I find it easier to grate - and grip while grating - if the dough is formed into a thick log instead. Also, a food processor with a grating disk does a great job here. Form the dough into 4 logs that are skinnier than the chute for your food processor. Wrap each with cling wrap and place in the freezer for no more than an hour. You don't want the logs to freeze solid; they might damage your food processor.