Co-founded in 1997 by Ellen Yin, Fork, a casual but sophisticated restaurant nestled in Old City, has become one of Philadelphia"s top dining establishments. The eclectic, but distinctly American style of cooking-influenced by many ethnicities-is, Yin describes, "New American bistro-style cuisine." Think pan-seared five spice dusted chicken livers aside spinach salad with caramelized onions, or braised lamb shank in port wine-orange jus with creamy mashed boniato and saut?ed swiss chard. Such are the delicacies Yin has been serving up for the past decade.