Nham — Isaan Fermented Pork Salad / แหนม

Isaan — pork fermentation as a preservation technique in the pre-refrigeration context; the product is culturally significant in the Northeast and has spread throughout Thailand

Nham is a lightly fermented pork product — minced pork and pork skin fermented with cooked glutinous rice and salt for 2–3 days at ambient temperature until pleasantly sour. The rice acts as a fermentation substrate; lactic acid bacteria produce a clean, tangy sourness. Nham is typically eaten as a salad component or with raw vegetables: sliced and combined with shallots, roasted peanuts, fresh bird's eye chilli, lime juice, and fresh herbs in a simple dressed assembly. The fermentation gives it a characteristic clean sourness, bounce texture from the pork skin, and a mild funk that is pleasant rather than aggressive. This is the Isaan technique for preserving pork, and the resulting product is a flavour ingredient in its own right.

• Lao som moo is identical; Vietnamese nem chua uses the same rice-pork fermentation logic; Northern Thai naem is the Lanna version; the lactic-acid pork fermentation technique appears in Chinese and Korean traditions as well.

Nham's clean sour-pork flavour fills a gap in Thai cuisine between the freshness of raw herbs and the richness of cooked proteins — it provides acid, salt, and umami in a single fermented product that anchors the simpler salad preparations of Isaan.