Managing Producer Sally Swift guest hosts this week’s show. Nopi's Yotam Ottolenghi explains his latest cookbook. Food critic Tom Sietsema of the Washington Post talks about selecting the top 10 food cities in the U.S. We get a primer in making yogurt with Cheryl Sternman Rule, author of Yogurt Culture. Lynne talks with rapper/poet Dessa about taking her food convictions with her on the road. America's Test Kitchen's Jack Bishop is back with the results from a vegan mayonnaise tasting. Plus, 20 techniques that we've learned from guests that we still use in the kitchen today.