English: Yen tafo (Thai script: เย็นตาโฟ) is the Thai version of the Chinese dish Yong tau foo. Yen tafo is a clear broth with, usually, very silky wide rice noodles, fish balls, sliced fried tofu, squid, and phak bung (also known as "morning glory" or "water spinach"). The pink colour comes from the special sauce made from preserved red bean curd and/or tomato ketchup. The dish is mildly sweet, salty and sour.