Sweet Potato Tong Shui

This is one of my favourite dessert, something light and refreshing :-) 

Sweet Potato Tong Shui
Ingredients
1 - 1.5 litre water
1 (approx 300g) sweet potato
20 - 25 red dates
1/2 cup dried longans
1- 2 tbsp rock sugar
some sliced ginger
some pandan leaves

Method

1. Peel the sweet potatoes and cut into cubes.
2. Boil water with some pandan leaves.  When water boils, remove pandan leaves. Add red dates, sweet potato and ginger.  Let it boil again, then reduce heat and simmer for around 30 mins.
3. Add in dried logan and rock sugar, cook for another 5 mins or till rock sugar dissolves.
4. Serve hot or cold.