This is one of the nicest haddock recipes I have. It combines the fish with a mix of vegetables and herbs, all of which is popped into the oven and baked.
Melt the butter in a large saucepan. Sauté the chopped onion, celery and mushrooms in the butter for about 5 minutes. Stir in the crumbs, salt, pepper and herbs.
Arrange the fillets in a layer on a greased large shallow baking dish. Sprinkle the fish with lemon juice and spread the stuffing over it. Cover with the tomatoes. Bake uncovered for 35-40 minutes.