Celebrated chef J. Kenji López-Alt schools us on the food history of teriyaki, nachos, and broccoli cheddar soup; music critic Ann Powers unpacks her latest book Traveling: On the Path of Joni Mitchell, which explores the musician's life and career, while addressing her own feelings about tackling the legend; and singer-songwriter Khatumu dispels the rumors that she was an "industry plant," before performing her song "Allergy Season."