Preheat the oven 190°C.
Cut the peppers into chunks, the courgette into rings, the onion into thin wedges. Arrange them in a baking tray, then drizzle with oil & vinegar, season with salt and pepper, scatter the dried herbs an top.
Roast in the oven for about 25 minutes until brown, turning them over once or twice.
Meanwhile, cut the cod into bite-sized chunks.
When the vegetables are tender, take the dish out of the oven and arrange the cod pieces on the top. Drizzle with some oil & lemon juice, season with salt and pepper, then put the dish back in the oven for about 5 minutes. Don’t overcook the fish!
Serve warm, with fresh herbs scattered on top.