LOS ANGELES, Feb. 5 (UPI) -- Tiffani Thiessen is returning to television this month in a new cooking channel show named Dinner at Tiffany's.The 40-minute episodes will center around Thiessen hosting dinner parties at her home for her celebrity friends. Some of the announced guests include her old co-stars Jason Priestley and Seth Green as well as Elizabeth Berkley and Mario Lopez. The show's pilot will premiere on...