Ginger & Sweet Potato Soup

Ingredients
•    2cm piece ginger peeled and finely chopped
•    1kg sweet potato peeled and cut into chunks
•    1 tablespoon brown sugar
•    1 litre Vegetable stock
Instructions
1.    Place the ingredients in the slow cooker.
2.    Cover and cook on LOW for 4 hours or high for 2 hours.
3.    Cool for 10 minutes.
4.    Using a stick blender, blend until smooth.
5.    Season to taste before serving.