A preparation specific to the southern Thai breakfast and lunch table — cold or room-temperature cooked jasmine rice mixed with a complex array of fresh herbs, dried ingredients, and vegetables, all dressed with a pungent sauce based on fermented shrimp paste, tamarind, and fish sauce. Khao yum is one of the most texturally complex single preparations in the Thai repertoire: each component is prepared separately, then combined at the table by the diner — the rice as the neutral base, the herbs and dried ingredients as the flavour layer, and the sauce as the binding medium.
**The rice:** Room-temperature cooked jasmine rice — not hot (which would wilt the fresh herbs) and not cold (which would be stiff and less absorbent). **The components (assembled separately, mixed at table):** - Shredded kaffir lime leaf (very fine). - Lemongrass (paper-thin slices). - Fresh herbs: mint, coriander, spring onion. - Bean sprouts. - Toasted shredded coconut (deep gold from dry-toasting). - Dried shrimp. - Dried chilli flakes. - Pomelo segments (separated vesicles). - Julienned fresh ginger. - Long beans (blanched, sliced). **The dressing (budu sauce — southern Thai standard):** - Budu: a southern Thai fermented fish sauce from Narathiwat province — thicker, more complex, and more intensely fermented than standard nam pla. - Combined with palm sugar, lime juice, fresh chillies, and toasted shrimp paste. [VERIFY] Thompson's specific khao yum dressing composition from the source text. Decisive moment: The balance of the budu dressing — intensely savoury and fermented as a base, rounded by the palm sugar's sweetness, brightened by the lime. The dressing is powerful — it must be used in small enough quantity that it dresses rather than overwhelms the rice and fresh herbs.
David Thompson, *Thai Food* (2002); *Thai Street Food* (2010)