Combine cornstarch, cinnamon and salt in small saucepan. Stir in orange juice and cranberry sauce. Cook and stir over medium heat until thickened. Set aside.
Place pork in shallow pan and spoon over about 1/2 cup cranberry sauce.
Roast in a 350-degree oven for 45 minutes to an hour, basting occasionally with additional sauce, until meat thermometer reads 155-160 degrees.
Let rest 10 minutes before carving. Serve with additional cranberry sauce.