ASAP was thrilled to be asked to attend and blog about another 2013 WNC Chefs Challenge, especially because the May 19 challenge secret ingredient was grown by New Sprout Organic Farms of Asheville! Keep reading to learn what chefs Cary Shackelford of Deerfield Episcopal Retirement Community and Greg Kilpatrick of Appalachian Grown partner restaurant HomeGrown created during battle sweet potato…