Creating a two-dish cooking environment not only saves you space in the oven, it also cuts down on dishes. To braise meats and simmer stews while also steaming a side of vegetables (or maybe dumplings?) you just need a steamer basket.
Dutch ovens are essential for tasks like braising meat and cooking up hearty stews, but they are also quite large, and take up more than their fair share of oven real estate. To use your Dutch oven to braise and roast at the same time, just flip the lid over.