Siān-hî ì-mī is a Tainanese specialty consisting of crispy eel noodles combined with chewy egg noodles and served in a type of brown sauce or a thick soup. A classic street snack, this dish is usually prepared with stir-fried swamp eels or rice-field eels, seasoned with black rice vinegar and soy sauce before being added to a thick broth alongside egg noodles.

Sweet and sour in flavor, the noodle broth is typically enhanced with wood ear mushrooms. In Taiwan, plates of eel noodles are a common sight at numerous Taiwanese night markets, local eateries, and high-end restaurants. Although the dish can be found throughout the country, it is most popular in the southern part of Taiwan.