As the number of gourmet home kitchens burgeons, so does the number of home cooks who want to become proficient users of the professional-caliber equipment they own. And of all kitchen skills, perhaps the most critical are those involving the proper use of knives. Norman Weinstein has been teaching his knife skills workshop at New York City's Institute of Culinary Education for more than a decade--and his classes always sell out. That's because Weinstein...