1 kg mussels (scrubbed and cleaned)
500 ml coconut milk
200 ml water
4 lemongrass stalks (cut into sections and bruised)
1 5-cm piece of ginger (peeled and sliced)
1 - 2 tsp fish sauce
1 tsp sugar
1 tbsp vegetable oil
fresh coriander leaves (to garnish)
Serve garnished with fresh coriander.