Archaeologists have uncovered the 250-year-old kitchen of Thomas Jefferson's enslaved chef, James Hemings, who introduced mac and cheese and meringues into US culture. Hemings became the property of Thomas Jefferson in January of 1774 when he was just nine years old. His younger sister is Sally Hemings, who had six children believed to have been fathered by Jefferson after the death of his wife Martha Jefferson. Growing up, Hemings was one of Jefferson's favorite servants and even accompanied him to Paris, France, in 1784. In France, Hemings learned the art of French cookery and upon their return to America, he...