Place all the dressing ingredients into TM bowl and blend 10 sec/speed 10. Remove most of the dressing and set aside.
Without cleaning bowl, place apple into TM bowl and chop 3 sec/speed 4.
Add grapes, celery, walnut pieces, rocket and dressing and mix 3 sec/Reverse/speed1.
Serve with a dollop of sour cream on top and additional cranberry sauce if desired.