Tong Bat Lat

Tong bat lat is a Dongguan (东莞) specialty, particularly associated with the town of Dongkeng (东坑). Two local stories are told about it, both folk legend rather than record: one credits the immortal Lü Dongbin, who during the Daoguang reign is said to have hidden an opium-curing pill inside a glutinous-rice ball set in syrup, naming the sweet 'tong bat lat' for the sugar that would not part from the dough; the other ties it to local courtship custom, in which a girl's family who approved of a suitor would serve him tong bat lat — a signal that the match could not be 'shaken off.' What is plain is the literal sense of the name: a tangyuan in a glaze so sticky it cannot be flung loose. It belongs to the wider Cantonese tong sui family of sweet rice-ball desserts.

The balls are soft and chewy — glutinous rice cooked to a tender, stretchy 'mochi' bounce — and slicked all over in a glossy amber syrup so they shine. The glaze is sweet with a warming bite of ginger running underneath, thick enough to coat without pooling into a soup. Over the top goes a generous fall of coarsely ground roasted peanuts and fine threads of fried egg, so each bite is sticky-sweet and yielding, then suddenly crunchy and nutty, with a savoury, eggy edge cutting the sweetness. Eaten hot, the contrast of slick ball, gritty peanut and soft egg is the whole appeal.

Two things make it work: a tender rice-ball and a syrup cooked to the clinging stage. The dough is glutinous rice flour bound with hot or cold water into a smooth, pliable mass — glutinous (waxy) rice is almost pure amylopectin, which gives the cooked balls their stretchy, non-crumbly chew. The balls are boiled until they float and turn translucent, signalling the starch has gelatinized through. Meanwhile sugar (often slab or brown sugar) is melted with ginger and a little water and simmered down until it thickens and turns sticky-glossy — cooked far enough to coat but not so far it hardens to candy. The drained balls are then folded through the hot syrup so it clings in a shining film — 'won't shake off' — and finished at once with peanut and egg, which must go on just before serving so they keep their crunch.