Fish wash, dry. To remove the gills. Cut along the spinal fin from head to tail. Remove the backbone, to remove the entrails. Again wash, dry with paper towel inside and out. Mix soy sauce, olive oil, seasoning for fish and balsamic vinegar. To marinate the fish.

Wash the vegetables well, dry. Potatoes clean. Chop all of the vegetables dice the potatoes into sticks. Fry in olive oil first, the potatoes for 3 minutes, add the onions. After 3 minutes add the bell pepper, after 2-3 minutes, the mushrooms. In the end, add the celery and crushed garlic. Season with salt and pepper. After a minute, discard garlic. Celery should remain crunchy.

Foil to make two "boats". It will not give the fish to lose its shape during baking. Grease the foil with olive oil. Fill the fish with vegetables, put the belly on the foil. Bake at 180* for about 30 minutes. Before serving, sprinkle the fish with grated Parmesan cheese. Serve with lemon.

For the sauce: broccoli disassemble on inflorescences. Wash. Blanch in salted water for 3-4 minutes. To shift ready broccoli in the blender. Add the cream, mustard, salt, black pepper. Blend to a smooth consistency. The thickness of the sauce can be adjusted.