Nam ngiao (thai: น้ำเงี้ยว, pronounced [ná(ː)m ŋía̯w]) or nam ngio (thai: น้ำงิ้ว, pronounced [ná(ː)m ŋíw]) is a noodle soup or curry of the cuisine of the tai yai people who live in the northeast of burma, the southwest of yunnan province, china, and in northern thailand, mainly in mae hong son province. the dish has become famous through the northern thai cuisine. nam ngiao has a characteristic spicy and tangy flavor.

Source: Wikipedia