Sweet potato, lime and ginger soup

Method

• step 1

  Heat 1 tbsp oil in a large pan over a low-medium heat, then add the sweet potato and cook for 5 minutes, or until the potato begins to soften. Add the onion, garlic and ginger, cover with a lid and cook for 10 minutes more.

• step 2

  Pour the stock and coconut milk over and bring to the boil, then reduce the heat and simmer for 15 minutes. Transfer to a blender or use a hand-held stick blender to blitz to a smooth purée. Strain through a fine sieve.

• step 3

  Return to a clean pan and bring back to the boil. Remove from the heat, then add the lime juice, half the zest and 50ml of the cream.

• step 4

  Season to taste. Divide the soup between 4 individual soup bowls, swirl over the remaining cream and add the remaining zest.