Mix the mung bean, water and color together (For each color you make you need to start with fresh water to avoid the color spreading).
2. Heat in a pan, stirring until the flour is cooked and has gone clear.
3. Press the gloopy mixture through a fine sieve into a bowl of icewater. It will set to form fine noodles.
4. Drain, then add the jasmin flavour.
5. Serve with coconut milk, sugar syrup and crushed ice.