Peel the vegetables, cut the onion into half rings. Cut the carrots into rings.

Clean the fish, rinse well inside and out, pat dry with a paper towel. Sprinkle salt and fish seasoning on all sides. Lubricate the whole fish with sour cream, put chopped vegetables in the belly. Cover the baking sheet with foil, place the fish on it, if you wish, you can put vegetables around it. Place the baking sheet in an oven preheated to 190 degrees and bake for 40-50 minutes. Garnish with herbs when ready.