Fragrant Prawn and Lemongrass Soup

A wise man once said: ‘A weed is a plant for which we haven’t yet found a use.’ Lemongrass looks like a weed, grows like a weed, and, like a weed, needs relatively little care; I am sure that long ago it was regarded as a weed. Until, that is, some bright cook took seriously its subtle lemony fragrance and tried the ‘weed’ in a variety of delicious dishes.

In any event, lemongrass is a Thai standard and fits in nicely with the many other spices and seasonings that give Thai soups th