Vegan binder for chinese style dumpling fillings
You can use any type of starch-paste. For example, flour paste (mix water with flour to form a thin-paste-like consistency) works good and is traditional in many parts of the world. similary, arrowroot paste, rice flour paste also works good.

Another option---boiled rice, the more glutenous the better (basmati, jasmine, any japanese rice). Boil them in extra water than directed, and then smash them with finger----excellent glue paste.