Yellow sour curry (gaaeng leuuang, แกงเหลือง) is considered a comfort food for the people of Thailand’s southern region. Lavish amounts of fresh turmeric give this spicy, sour and salty curry its rich yellow tint, as well as its earthy aroma and a pleasantly bitter taste. The curry also contains generous portions of the southern dark fermented shrimp paste, resulting in a cloudy, ochre-colored dish.
Southern yellow sour curry is primarily made with saltwater fish, and with either water spinach (phak boong ผักบุ้ง), bamboo shoots (fresh or pickled), green papaya, the stems of the giant elephant ear plant (Colocasia gigantea) (aaw dip อ้อดิบ or thuun ทูน), winter melon (fak khiaao ฟักเขียว) or lotus stems. But versions of the curry that include freshwater fish, shrimp, salted threadfin fish (bplaa goo lao khem ปลากุเลาเค็ม), or even beef or pork belly, are not rare.