Your picture above makes me hungry!
We buy smoked trout from Trader Joe's and it is delicious in salads.
We pretty much eat ocean fish, so I don't know how well this translates, but you speak of mild white flaky fish, and we eat lots of haddock and cod. DH often cooks it in a saute pan with risotto and spinach, or bakes it with lemon, butter & bread crumbs. We're big fans of fish chowder (the milk based variety). Fennel is really nice in a haddock or cod fish chowder.(I don't like onions).
Happy eating - seafood is my favorite source of protein!