Preheat the oven to 200 ° C (top / bottom heat). Cut the vegetables (tomatoes and zucchini) and mushrooms into cubes and place in a glass baking dish. Season the vegetables with salt, pepper and chilli.
Lay the fish fillets on the vegetables and sprinkle with dill, salt and pepper. Cook in the oven (fan oven) at 200 ° C for 20 minutes. Serve pure or with rice, potatoes, etc.