Rice's Sweet Potato and Carrot Soup

Description
Hi, my name is Rice. The following is my delicious and easy sweet potato and carrot Soup.

Ingredients

 * 2 sweet potatoes peeled and chopped
 * 2 large carrots peeled and chopped
 * 1 large white onion chopped
 * ½ tsp ground cumin
 * ½ tsp ground coriander seed
 * 1 vegetable stock cube

Directions

 * 1) Place all ingredients in a large saucepan and pour over 1.25 litres boiling water.
 * 2) Bring back to the boil and allow to simmer for 20 minutes or until the vegetables are tender.
 * 3) Allow to cool then blend in a food processor or blender.
 * 4) Reheat and enjoy, adding chopped coriander leaves if desired.