Cut the cabbage in half, then cut it into
quarters. Remove and discard core, then
thinly shred cabbage. Put into a large
mixing bowl. Add the carrot, onion,
mayonnaise, yogurt and mustard. Snip
in most of the chives.
Mix coleslaw well with your hands,
making sure every bit of salad is coated
in the dressing. Season, then cover and
chill or serve sprinkled with the cheese
and the remaining chives.