dried fish ideas
Sounds kinda like stockfish.
I would take a mallet to it to break it down a little. Then soak it maybe overnight. As long as you didn't salt it. If it's salted then you will have to soak much more and change water. Maybe 2 days. Then poach it and add it to whatever floats your boat.
When I was a little kid salt cod was a common item everyone ate. It was soaked and rinsed about three times to get the salt out. Then it was stirred into a bechemel sauce and served over toast. You can add peas, hard boiled eggs, whatever you want. It's actually better than it sounds. I would also think it would work in a fish patty. Cracker crumbs, grated onion, dill weed, lemon juice, raw egg and fish. Mix together and fry in patties. Now I'm hungry, darn it.