Fish Roasted on a Bed of Tomatoes and Potatoes

One-pot meals are low maintenance, easy to clean up, and offer lots of great flavors in one vessel. You can make something stewy on top of the stove, or layer everything in a handsome baking dish and use the oven. Here, haddock or cod is roasted with tomatoes, onions, and potatoes tossed with olive oil, oregano, and herbs. Before you cook it, marinate the fish in the herbs. While that sits, layer yellow potatoes, a chopped Spanish onion, and tomatoes in the baking dish. Roast until fork tender.