Man on the street Doc Willoughby learns about Cuban cuisine at La Carreta in Miami, Florida. Then, Dan Souza demonstrates how to make ropa vieja. Next, test cook Becky Hays prepares plátanos maduros. Then, testing expert Adam Ried reviews grapefruit knives in the Equipment Corner. Finally, test cook Julia Collin Davison demonstrates how to make mango, orange, and jícama salad.