Fried fish is in the past! Familiar cook taught, now I cook FISH only SO for the holiday dinner

Recipe: - carp - 400 g - water - 500 ml - milk - 500 ml - 1 boiled egg - champignons - 100 g - boiled buckwheat - 100 g - flour - 3 tbsp. - vegetable oil - 3 tbsp. - salt pepper - onion - 700 g - greens, boiled eggs (for decoration) Bake at 220C/428F for 30 minutes