Thai Sweet Potato Soup

Place sweet potato and water in a large saucepan. Bring to the boil, then reduce heat, cover and simmer until sweet potato is soft.
Heat oil in a frypan. Sauté onion, curry paste and lemon grass until soft.
Remove from heat and add to sweet potato.
Add brown sugar, salt, Sanitarium So Good and coconut milk. Blend or process mixture until smooth and creamy.
Reheat but do not boil. Stir through coriander. Serve garnished with extra coriander.

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