Kermit Lynch discovered a mustard from a producer midway between Orange and Nimes in the southwestern part of France's Rhone Valley. Unlike the more famous mustards of Burgundy's Dijon region, this wonderful, pale yellow mustard has a powerful kick more like that of wasabi. Samantha sampled it, then couldn't stop thinking about it. She ordered a case for herself. Get a baguette, some salami and cheese, slather on this amazing mustard and--voila!-- you have lunch.