Marinate the fish with herbs and leave it for 20-30 minutes.
Preheat the oven at 400°F or 200°C.
Bake the fish for about 20 minutes.
Meanwhile, the fish is baking, prepare the sauce.
Take a saucepan and melt 100 gr of butter.
Add 1 pack of sour cream ( 200gr) and stir about 5-7 minutes until it thickens.
Add 50 g of blue cheese for a thicker consistency, and for a more pronounced taste.
Pour a shot of whiskey for a better and the best aroma.
Add the caviar, season with salt and pepper.
Pour over the fish and serve immediately.