Almost twenty years ago, some of the most revered chefs in the world--including John Ash, Rick Bayless, Susan Feniger, Nobu Matsuhita, Nora Pouillon, Michael Romano, and Alice Waters--looked at the way Americans were eating and decided that they had to help change it. They had watched while processed foods replaced fresh food in our supermarkets. They saw family farms disappear and huge agribusiness corporation take over. They...