To Prep
Pound chillies and garlic together then add fish sauce, vinegar, lime juice and sugar. Mix well until sugar is dissolved.
Add tomatoes and onion and set aside for 1 hr.
Wash and clean the squid tubes, and cut into 1.5cm rings.
To Cook
Bring 6 cups of water and a pinch of salt to the boil. Add the squid and cook for 5 mins until soft and tender.
Toss with the prepared dressing and garnish with the hot mint leaves before serving.