Some of this is well-worn territory for those who have been following Andrés’s career, though perhaps in a more digestible form than, say, his detail-rich book, “We Fed an Island.” Howard takes detours, for instance, to give credit to the chef’s mentor, Robert Egger of D.C. Central Kitchen, or to give screen time to favorite Andrés topics, such as migrant farmworkers, but without getting overtly political.