HUBERT KELLER is the chef and owner of Burger Bar in the Mandalay Bay Hotel & Resort in Las Vegas, in the Lumiere Place Casino & Hotels in St. Louis, and at Macy's Union Square in San Francisco. He is also owner/chef of Fleur de Lys in San Francisco and Las Vegas and SLeek Steak House and Ultra-Lounge in St. Louis. The winner of a James Beard Award for Best Chef: California and named one of the ten best chefs in America by Food & Wine, Hubert Keller is also the host of the public television series Secrets of a Chef. Keller was the first invited guest chef in White House history and personally