Sausage casserole is a hearty and comforting dish made with sausages, vegetables, and a flavorful sauce. The sausages are browned to perfection and then simmered with onions, carrots, and potatoes in a rich tomato-based sauce. This casserole is perfect for a cozy family dinner or a potluck gathering. Serve it with crusty bread or mashed potatoes for a complete meal.