Heat the oil in a saucepan and sweat the spring onions and garlic cloves until golden. Then add the chard and pour in water. Let simmer until the vegetables are soft. Add coconut milk and spices and mix finely with a hand blender.
The soup tastes wonderful when it is warm and can also be served ice cold, e.g. the next day.
If you love spiciness, you can also cook a chilli pepper.