Last week, Mario Batali unveiled a new recipe at an event to benefit his equally new charity, The Mario Batali Foundation.The recipe was for machaca, which comes from the Mexican word machacado -- 'pounded' or 'crushed'. The preparation originated with the ranchers and cowboys of northern Mexico, who would air-dry beef with chile peppers and spices in order to preserve it. The meat would then be rehydrated and slowly cooked over an open flame until falling apart. "Machaca is easy to make, authen
