1. Heat water in a pot until boiling. Then scald the shrimps in boiled water for just a short time. Remove and drain.
2. In a small bowl, prepare the sauce by adding lime juice, fish sauce, sugar and roasted chili paste. Stir until all ingredients mixed well.
3. In a big bowl, add the shrimps, prepared sauce, lemongrass, onion, chili, spring onion, coriander, kaffir lime leaves and mint leaves. Stir until all ingredients mixed well.
4. Transfer to a serving plate. Garnish with coriander leaves and serve immediately.