Wash the fish, pat dry, divide into 4 pieces and sprinkle with lemon juice. Peel and slice the carrots. Cook in little boiling salted water for about 5 minutes. Add peas and cook briefly.
Drain the vegetables. Mix sour cream and cornstarch and fold into the vegetables. Season with salt and pepper. Put the vegetables in an ovenproof dish. Season fish fillets with salt and place on top.
Mix cheese, breadcrumbs and herbs and spread on the fish. Bake in the preheated oven (electric: 200 ° C / gas: level 3) for about 15 minutes until golden brown. Garnish with parsley and basil.
It goes well with rice.