Here's what I was doing for a seafood cream sauce for Halibut on the Summer menu. Pan-sear the halibut. When the fish was flipped, add some diced shrimp to the pan, and place the pan in the salamander to finising cooking. When the fish was "almost" done, remove from the pan and place under the heat lamp to keep warm and finish cooking. With the shrimp still in the pan, place it back over heat. Deglaze with a shot of white wine and shot of shrimp stock. Add cream. Bring to a boil, and season TT with S&P. Pour the sauce around the fish in the bowl.
Note that this particular sauce isn't reduced, nor is it thickened. Shortly after we started running that menu, my relief saute cook made an order, and reduced the sauce down heavily, like for an alfredo sauce. The member that ordered that dish LOVED it, but got really hacked the next day when I made it the way it was "supposed" to be made, and he didn't like the thin sauce.
Maybe a dill cream sauce would work? Pan-sear the salmon, flip, finish in a broiler, remove the fish when done, add some shallots and caramelize lightly, deglaze with white wine and/or fish/shrimp stock, add some cream, and just a wee little bit of dill. Reduce to desired consistency. Season TT with S&P.
Peace, Love, and Vegetable Rights!
Eat Meat and Save the Plants!