Courtesy of Taco BellJust a few weeks after Taco Bell debuted its new Loaded Beef Nachos as part of a revamped value lineup, another exciting new nacho dish is hitting menus at the chain.Taco Bell just began testing new Cantina Chicken Loaded Nachos, which are piled high with a medley of flavorful toppings including warm nacho cheese sauce, reduced-fat sour cream, seasoned beans, pico de gallo, creamy chipotle sauce, guacamole, and a three-cheese blend. Unlike Taco Bell's other beef-laden nacho