- STEP 1
Saute the leeks for 4 minutes in the butter. Add the stock and sweet potato and bring to the boil. Simmer for 15 minutes, or until the sweet potato is cooked.
- STEP 2
Season the mixture with black pepper, remove from the heat and allow to cool.
- STEP 3
Place the cooled soup into a food processor, and liquidise until smooth.
- STEP 4
Return the soup to the pan and bring back to the boil, adding any extra water as necessary to thin the soup to the required consistency.
- STEP 5
If desired, grill the bacon until crispy, and cut into bite sized pieces.
- STEP 6
Place the soup into the serving bowls and sprinkle the bacon pieces over the top.