In 1992, Steve Ells was a classically trained chef working in a high-end restaurant in San Francisco. But after eating a burrito at a local taqueria, he got an idea: to sell burritos and earn enough money to open his own gourmet restaurant. The first Chipotle opened in Denver the following year. Bringing his culinary training to taqueria-style service, Steve Ells helped transform the way we eat fast food. PLUS for our postscript "How You Built That," how Alexander Harik turned his mom's recipe for za'atar spread—a fragrant Middle Eastern condiment—into Zesty Z: The Za'atar Company.