This make-ahead sausage, mushroom, and polenta bake is a hearty and flavorful dish that is perfect for a cozy dinner. The combination of savory sausage, earthy mushrooms, and creamy polenta creates a satisfying and comforting meal. The dish can be prepared in advance and baked when ready to serve, making it a convenient option for busy weeknights. Serve it with a side of green salad for a complete and delicious meal.