There must be a million halibut recipes but I'm telling you, this one is a rich winner. Years ago I was browsing for a place to stay and found a Bed and Breakfast that claimed a version of this as their "signature dish". I've always loved that terminology so if you're having a party, wanting a treat or celebrating a special occasion I recommend claiming this as your very own "signature dish". It sounds so elegant!
~serves 2 for dinner~
Sprinkle salt on your halibut and place in a dish or a big ziplock bag. Pour the wine over the fish and let it marinate for at least 15 minutes. (You can also skip this first step if you don't have wine handy.)
Set your oven for 380 and line a baking dish with foil for easy clean-up later. In a fry pan, sauté your onion and garlic in the olive oil until desired tenderness and set aside to cool for a few minutes. Once it's not blazing hot, stir the sour cream into the onion/garlic mixture. On a plate, spread a few bread crumbs out. Take your halibut out of the wine, let it drain for a moment and then roll it in the bread crumbs to coat all sides. Place the fish in the baking dish and pour the sour cream and onion mixture over the top, smoothing it out evenly.
Bake for about 18 minutes and then check for doneness. If you're going for the gusto, sprinkle the macadamia nuts over the fish and return to the oven for about 2 minutes until the nuts are toasty brown. Serve with the rest of that white wine, a light vegetable side dish (the fish is quite rich with the sour cream) and prepare to impress!