Known for its clean, minimalist atmosphere and hefty foil-wrapped burritos the size (and weight) of a small infant, Chipotle pioneered the fast-casual, assembly line Mexican food genre that's since grown to encompass chains like Qdoba and Baja Fresh. The protocol in Dallas/Fort Worth and elsewhere? Diners proceed single-file down the line and orchestrate the construction of their burrito, tacos (soft or crunchy), rice bowl, or salad with proteins including braised pork carnitas and grilled chicken, steak or new tofu sofritas. Rice, beans, and a kaleidoscope of salsas from mild to sinus-clearing, plus garnishes like sour cream, guacamole and lettuce, complete the picture. Once heavily backed by McDonald's, Chipotle broke away from the fast food mega-corp in 2006 and has since gained favor with customers by sourcing all-natural, hormone-free meats and even some local produce. It hired celebrity chef Nate Appleman as "culinary manager" in 2010 to man the New York test kitchen and work on research and development to keep Chipotle on the forefront of food trends.