Tracie McMillan is the uncommon person who combines long-term, in-depth reporting, elegant writing, and compelling story in The American Way of Eating: Undercover at Walmart, Applebee’s, Farm Fields and the Dinner Table. (See this superb NYTimes review.) At my request, Tracie wrote this guest post. She has explored our food system from the bottom rungs, as a worker from California to Michigan to New York, so I asked her what’s the most important thing she’s taken away from her reporting and writing this book.  —M.R.   By Tracie McMillan One of the curious things about doing a semi-ridiculous reporting project—say, leaving behind your life to go work undercover as a farm worker, Walmart produce clerk, and Applebee’s kitchen wretch—is that near-strangers confront you with grand, existential queries. Like: What’s the most important thing you learned? Read On »