Som Tam — Green Papaya Salad Mortar Technique / ส้มตำ

Isaan and northeastern Thailand — arguably Lao in origin, adopted across Thailand; the modern Bangkok version differs from the Isaan original in using peanuts and dried shrimp more generously

Som tam is the most eaten salad in Thailand — 40,000+ restaurants sell it in Bangkok alone — and it is entirely defined by the mortar-and-pestle technique, not by a mixing bowl. The technique is 'dtam': a bruising-and-mixing action using a long pestle to gently crush the ingredients while simultaneously tossing with the spoon, developing flavour without reducing everything to pulp. The green papaya is shredded on a wooden mandoline (or painstakingly with a knife) into long, thin, fibrous strands. The dressing is built in the mortar layer by layer: chilli and garlic crushed first, then palm sugar, then fish sauce, then lime, then the papaya added and bruised in. The sequence is non-negotiable for the correct flavour and texture integration.

• Lao tum mak houng is the same dish (and possibly the original); Cambodian bok l'hong is a direct parallel; Vietnamese gỏi du đủ uses a similar green papaya base with different dressing aromatics.

Som tam's brilliance is textural contrast as much as flavour: the crisp papaya against the soft dried shrimp, the crunchy peanuts, and the yielding green beans — each bite is different, which is why it never becomes monotonous.