Chinese mustard, gai choy, Indian mustard, kai choy, leaf mustard, mustard greens, swatow mustard greens
Mustard cabbage (gai choy) is a peppery variety that does not form heads like most other cabbages and is a dark yellowish-green colour. Both the stems and leaves are edible. Because it has a stronger flavour than most other brassicas it is often cooked mixed with other greens.
If the flavour of mustard cabbage is too strong for your liking, you can blanch or mix with milder flavoured greens in a stir-fry.