1Place pickling spice in the center of a piece of cheesecloth or coffee filter. Tie tightly with a long piece of string. Set aside. Coat short ribs with flour.
2Heat oil in large deep skillet or Dutch oven on medium-high heat. Add 1/2 of the short ribs; cook 5 to 10 minutes or until browned on all sides. Add short ribs to slow cooker. Repeat with remaining short ribs. Place vegetables and spice bundle over short ribs in slow cooker. Mix beef stock, soy sauce, vinegar and roasted ginger. Pour over top. Cover.
3Cook 8 hours on LOW or 4 hours on HIGH or until short ribs are tender. Stir in crushed gingersnaps during last 30 minutes of cooking. Stir in bok choy during last 15 minutes of cooking. Discard spice bundle. Serve short ribs and vegetables over cooked Asian noodles.