Preheat oven to 350 degrees F.
liberally with salt and pepper. Melt
butter in pan and sear
both sides of fish. Remove from pan and set aside.
Add mushrooms, scallions, pepper, and paprika and cook over low heat. Add flour and make a roux
. Whisk in stock by thirds and bring to a simmer
in sour cream
and check seasoning.
back into the pan, cover, and roast
in the oven 30 minutes or until fish is flaky