Watercess Spare-ribs Soup

Its been ages since i last had watercess. I dun reali like those where the soup stall sells as the watercess tends to be yellowish & will feel very thirsty after drinking the soup.
I've always love to eat my greens "Green".To me the point is, if greens are overcooked,no point eating them as they've already lost its nutrients & vitamins.

Ingredients;
500g spare-ribs
20g wolfberries
6 red dates
3 glove garlic
Boiling water
Salt to taste
1 bunch watercess

Method;
-Wash & clean spare-ribs.
-Cut off stem from watercess.
-Wash & clean garlic, do not remove skin.
-Bring a pot of water to boil
-Add boiling water to the slow cooker, set mode on high auto.
-When boiling water high boils, add spare-ribs, garlic & red dates.
-Let soup slow cook for about 1 hr, add salt to taste.
-Juz b4 serving, add watercess to the soup, boil for another 5 mins.
-Serve hot.
-Enjoy!

*Do not cover the pot while cooking watercess, otherwise it will turn yellowish.