In a small saucepan combine cranberries, orange juice and zest, port, sugar and cinnamon. Bring to a boil, reduce heat to simmering and cook until cranberries are tender, stirring occasionally. In a small cup make a slurry with cornstarch and 1 tablespoon water. Whisk cornstarch mixture into cranberry sauce and cook, whisking, until sauce thickens. Taste and add more sugar, if necessary.
Recipe courtesy of Emeril Lagasse, Emeril's Food of Love Productions, 2006