Place brisket in a 6-qt. slow cooker. In a small bowl, mix remaining ingredients; pour over brisket. Cook, covered, on low 7-9 hours or until tender.
Transfer brisket to a platter; keep warm. Discard cinnamon stick. Skim fat from cooking juices. In a blender, cover and process cooking juices until pureed; pour into a small saucepan. Bring to a boil. Cook, uncovered, 13-15 minutes or until thickened, stirring occasionally. Cut beef diagonally across the grain into thin slices; serve with sauce.
Freeze option: Place brisket in freezer containers; top with sauce. Cool and freeze. To use, partially thaw in refrigerator overnight. Heat through in a covered saucepan, gently stirring and adding a little water if necessary.