食不厭精，膾不厭細 [－－厌－－脍－厌细]

Jyutping sik6 bat1 jim3 zing1 , kui2 bat1 jim3 sai3
Pinyin shí bù yàn jīng , kuài bù yàn xì

Definitions (CC-CEDICT)
  1. lit. to eat but finely ground grain and finely chopped meat (idiom, from Analects)
  2. fig. to be fastidious about one's food