Host Francis Lam talks with Azalina Eusope, a fifth-generation street vendor from Malaysia setting the San Francisco food scene on fire. Vegetarian food writer and filmmaker Anna Thomas explains why colorful, nutrient-rich green soups are the perfect antidote for the wintertime blues. Bridget Lancaster, host of America’s Test Kitchen, has been investigating sourdough starters in her kitchen and provides us with a primer. Contributor and New York Times columnist Melissa Clark talks to Elaine Khosrova about her fascinating book, Butter, A Rich History. Ann Taylor Pittman, food editor at Cooking Light magazine, makes the journey her mother's homeland of Korea. And we ask beer expert Greg Engert to break down the main flavor profiles of craft beer.