Dai Minority Cooking: Banana Leaf and the Warm Valley Kitchen

The Dai people of Yunnan's Xishuangbanna prefecture share ethnic, linguistic, and culinary kinship with the Tai peoples of Thailand and Laos. Their cuisine occupies the warm subtropical valleys far below the Yunnan plateau, and it pivots completely from the highland Chinese tradition — the lemongrass grows wild, the herb garden runs to fresh mint, coriander, and sawtooth herb (culantro), and sour is a flavour held in equal standing with salt. This is not Chinese food that happens to be in China. It is Southeast Asian food on Chinese soil.

Banana leaf cookery is the Dai kitchen's signature technique. The leaf is passed repeatedly over an open flame or blanched briefly in hot water until pliable — it should bend without tearing. Wipe dry. Filling: a whole fresh fish — tilapia or freshwater carp — marinated for 20–30 minutes in a wet paste of fresh lemongrass, galangal, garlic, dried chilli, and salt. The leaf is folded around the fish in a two-fold sealed envelope and pinned with a bamboo skewer. Grill over charcoal at moderate heat, turning twice, for 15–20 minutes. The leaf chars on the outside and steams the fish within, simultaneously conducting heat and perfuming the protein with the leaf's green, slightly astringent botanical character. Second technique: fresh herb salads dressed with lime juice, fish sauce, and toasted rice powder (kao kua) — identical in technique to Thai larb, and very likely its ancestor.

Served with glutinous sticky rice pressed into a ball and torn by hand, a fresh herb plate of mint, coriander, Thai basil, and sawtooth herb, and a dipping sauce of fermented soybean paste thinned with lime and fresh chilli. The meal is sour, herbal, charred, and clean. Nothing about it resembles northern Chinese cooking.