Fish Gratin With Button Mushrooms - cooking recipe

Ingredients

2 lbs fish fillets
14 ounces button mushrooms
3 shallots
1 1/2 tablespoons butter
1/2 - 3/4 cup white wine
butter, for the dish
1 tablespoon oregano
salt and pepper
1/2 cup cream
2 egg yolks
2 tablespoons shredded gruyere cheese
2 tablespoons butter, flakes

Preparation

Clean button mushrooms and slice. Mince the shallot. Braise both in butter for approximately 5 minutes. Deglaze with white wine, cook and reduce liquid slightly.
Butter a gratin dish. Mix half of the mushrooms with herbs and distribute on the bottom of the dish.
Add salt and pepper to the filets and place on top the mushrooms. Cover with the remaining mushrooms and bake in the 350\u00b0F oven for approximately 20 minutes.
Stir egg yolk into the cream. Remove the juice that formed while baking the fish and add it to the egg-cream mixture. Season with pepper and salt and pour over the fish filets. Sprinkle cheese over the dish and add a few flakes of butter.
Bake another 10 minutes at 350\u00b0F heat. Don't let a brown crust form, if necessary cover with aluminum foil.
Serve with freshly peeled boiled potatoes, grainy rice or fine noodles.