What's the name of steamed bread sauce for fresh fish in Li Er?

Detailed method of steaming steamed bread with fresh fish in Li Er: put brown sugar into the steamed bread, dip sesame seeds on the surface, roll it into a round cake shape and put it on the stove (the bottom is baked with charcoal fire, the stove surface is iron plate, and the stove is covered with mud paste, so that the steamed bread can be cooked against the wall). In the meantime, the steamed bread keeps moving to prevent it from becoming mushy. After the surface is dried and shaped, it is put into a furnace vertically, covered with an iron plate and heated for a while, and then cooked.