Place sugar and water in a small saucepan.

Place over medium low heat. Heat and stir until sugar has dissolved and liquid has reduced to a syrup. Remove from heat.

Immediately add vinegar. soy sauce and salt.

Place in a jar and allow to cool to room temperature before using. If making in advance, store in a tightly sealed jar or container, in the refrigerator, until ready to use. Remove from refrigerator and allow to come up to room temperature before serving.

Just before serving, stir in chilli and coriander. Mix well.