Peel and thinly slice the carrots, then peel and slice the onions. Roughly chop the tomatoes and finely chop the cloves of garlic.
Place the fish, carrot, onion, tomato, garlic and bay leaves in a baking dish. Season generously with sea salt and black pepper, then drizzle over the oil.
Finely chop the parsley and sprinkle over the fish. Squeeze in the lemon juice and add the wine and a little water.
Bake for 30 minutes or until the fish and veg are cooked and the sauce has thickened. Serve lukewarm or cold with an extra squeeze of lemon.