Clean the fish, cut them in 2 halves lengthwise and place in a suitable tray. Cut the onions into crescents, the carrots into semicircles and grate the tomatoes. Heat 2-3 tbsp olive oil and braise the veggies until semi-cooked.
Season with salt, black pepper grains and bay leaf and pour everything over the fish. Cover with foil and bake 15 min. in a preheated 356°F (180 °C) oven, then remove the foil and bake until done.
Source: Ilyana Ikonomova.