Several stages of this dish can be made in advance, making it ideal for holiday cooking. The bread can be dried up to 2 days ahead. The sausage and vegetables can be cooked up to a day ahead (store them in an airtight container in the refrigerator). The whole dish can be fully assembled up to a day ahead, covered with foil and stored in the refrigerator. If baking from cold, add an extra 5 to 10 minutes baking time.