The Fish dumplings appear to be bugged, I can make the raw dumplings but they wont cook up.
I successfully cooked turnip and soybean dumplings, and attempted to cook the fish dumplings in the fire exactly the same way and they just sat there, never coming up to temperature.
While I'm here: I love this mod. Being able to dry berries and use them in porridge and the ability to make pemmican are my favorite additions.