I always add honey and balsamic vinegar to my steamed cabbage (along with some red onions). Proportions? I don't measure them, but probably a quarter cup of vinegar and a quarter cup of honey to a head of cabbage.
It's really good, probably would be even better with celery and carrots.
NOTES : Another good way is to use chicken broth as the liquid when cooking cabbage,etc.-and sometimes I also add a tiny bit of