Soak tamarind in 11/2
tablespoons hot water. Strain through a fine sieve,
extracting as much liquid as possible. Reserve liquid. In a wok, heat oil over medium
heat. Add onion, garlic and chilies and
cook for about 4 minutes until softened but not colored. Stir in turmeric. Add beans and 175 ml coconut milk
to pan. Bring to the boil and simmer for 5
minutes. Add Chinese leaves and cook for a
further 4 minutes until vegetables are just tender. Stir in tamarind liquid, tomatoes
and remaining coconut milk. Heat, stirring for 1-2 minutes. Season with salt to taste.