A smooth sweet potato soup with a refreshing Thai twist.
- To make this vegan, just leave out the fish sauce.
- When preparing lemongrass, you want to keep the lemongrass as a single piece as you’re going to remove it from the pan before blitzing. Cut it in half lengthways but stop before you get to the bottom, leaving the bulb intact. Then use a small pan or a kitchen mallet to bruise it – this helps let all the flavour out.