My sister prepared a really nice special southern fish hot pot called Ca Keo for our dinner while I was staying with her in Saigon. Ca Keo is a small, thin, long white fish with not too many bones and a delicious flavour.
She made the stock by following a special recipe which included lots of herbs, bean shoots, lotus, water spinach, banana, Bach Tang, Giang and Dang vegetable, lots of green veggies and a really special vegetable called Nhut vegetable which is only available in the south. She bought the live fishes, mixed them in vinegar and salt to get rid of all the scales from the fish, and then boiled them for a few minutes before eating them straight by deeping some fish sauce with chiili.
This is a very healthy dish especially from Ho Chi Minh City that can be served with different noodles or rice.