Arrow Jump To RecipeSave Recipe SavePrint Developed in the 1980s by a chef in Hong Kong, this sauce leans on a trio of umami-heavy ingredients: dried scallops, dried shrimp, and cured Chinese pork (specifically, Jinhua ham), for their powerful flavors. I have never had a bad XO. This is an expensive sauce, as dried seafood does not come cheaply, but homemade beats store-bought any day because you can control the quality of the ingredients and the care that goes into the preparation.