Tiffani Thiessen, best known for her roles on "Saved By the Bell" circa 1990s, and in the original "Beverly Hills 90210" has scored a new cooking show in which she lets viewers into her home as she hosts dinners with her celebrity friends. Set to premiere on The Cooking Channel later this month, "Dinner at Tiffani’s" will feature Thiessen in her ‘favorite’ role, that of dinner host, she said.