I heard about this Plaice (dried flounder) the first time from a Hong Kong friend, she told me that before MSG was invented, the Cantonese rely on natural resources to season their dishes and soup, and this Plaice powder is one of the essential ones.It is the most important ingredients in Cantonese style Wonton and Wonton soup noodle.
I almost never used any MSG in my cooking, I treasure and appreciate the natural flavors of foods and its ingredients. I may have no MSG at home but I have always keep a bottle of this homemade plaice powder in my pantry. I used it in all the recipes that called for MSG and it is my go to stock powder, it could turn a pot of water into tasty stock in no time.