Preheat the oven to high temperature (broil), so that the grill from the top of the oven is heated.
Prepare the sauce. Cut the shallots finely and put them in a pan with the wine and vinegar. Wait for it to boil over medium heat for 5 minutes until it evaporates. Add the cream and bring to a boil for 2-3 minutes. Add a few pieces of cold butter and mix with a balloon whisk. Before continuing to add butter, make sure the previous piece has melted.
Transfer the sauce to a bowl and add the mustard, stir and season with salt and pepper.
Put the fish fillets on a baking sheet lined with wax paper, and brush them with olive oil. Sprinkle with salt and pepper. Bake in the oven on the highest temperature for 5-6 minutes until cooked.
Nutritional Information
* * Information per 100g serving, percentage of daily values based on a 2,000 calorie diet.
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