1. In a bowl, add the vermicelli noodles with boiling water until covered and soak for 5 mins.
2. Drain and run with cold water. Set aside.
3. In a bowl, dissolve brown sugar with 2 tablespoons boiling water. Add the garlic, ginger, red chilli, fish sauce and lime juice. Give a good mix.
4. Add the prawns in the mixture, mix it well and next add the vermicelli and cucumber.
5. Run through with forks to mix it well.
6. Transfer the mixture on to serving plate and sprinkle mint leaves, coriander leaves, crushed cashew nuts and chilli flakes.

Ready to serve.