(If cooking now, preheat the oven to 350°F.) Spray a 9x13-inch casserole dish with cooking spray.
Place the bread in a single layer in the prepared dish (cut pieces to fit).
Brown the sausage in a large skillet over medium heat; spoon off any accumulated fat. Sprinkle the cooked sausage over the bread. Sprinkle cheese over the top.
In a medium bowl, whisk together the remaining ingredients. Pour over the sausage and cheese layers.
You can bake now, or cover with plastic wrap and place in the refrigerator for several hours or overnight.
When ready to bake, remove from the refrigerator and bring to room temperature (about ½ hours). Remove the plastic wrap. Bake 30 to 35 minutes. The top should brown up nicely.