What is this Kau Kei? Well my late mother used to tell us that this vegetable is good for our eyes. At that time, we were not bothered to ask any questions. We do consume it once in a while but now that has changed.
A couple of weeks back, while doing her weekly marketing, my sister saw a young man buying this type of vegetable and overheard him telling the vegetable seller that his mom had problems with her eyesight and apparently after consuming several rounds of this vegetable, her eyesight has improved. Now this has prompted my sister to include this vegetable in her weekly 'must have'. I have no complaints and no problem eating this vegetable on a weekly basis because I want my eyesight to improve also.
The stem of this vegetable is very hard and full of thorns. So when plucking the leaves, one has to be very careful. The leaves can taste bitter and best to make a vegetable soup out of this with some minced meat to make it tasty.
I even went to check out what is the scientific name of this vegetable. This is the website http://new.dpi.vic.gov.au/notes/horticulture/vegetables/ag1393-glossary-of-asian-vegetables I went to and it is very good. It shows you what is this called in other countries too.