Only on the "CBS This Morning" podcast, CBS News correspondent Bianna Golodryga talks with Sweetgreen co-founder Nicolas Jammet about how he built a cult salad chain by celebrating real food. Jammet, who founded Sweetgreen with two of his college classmates just 3 months after graduating, talks about using data to craft an ever-evolving menu, how a deep involvement in their supply chain was crucial during the recent deadly romaine lettuce recall, and what's next for the salad phenomenon.