Sausage and Cheddar Stuffed Onions are a delicious and hearty appetizer or side dish. The sweet onions are hollowed out and filled with a flavorful mixture of sausage, cheddar cheese, breadcrumbs, and herbs. The onions are then baked until tender and the filling is golden and bubbly. These stuffed onions are perfect for entertaining or as a comforting dish for a cozy night in.