Preheat oven to 350°F. Spray an 8" x 8" casserole dish with nonstick cooking spray. Set aside.
Place all of the torn bread pieces into the casserole dish and set aside.
In a small bowl, mix together the brown sugar, salt, and cinnamon. Sprinkle the brown sugar mixture over the torn bread.
In a medium-sized bowl, whisk together the milk, eggs, and vanilla extract until well-combined.
Pour the egg mixture over the bread, coating completely.
Cover the casserole dish with aluminum foi foil and place in the refrigerator overnight.
Remove the casserole from the refrigerator and leave the aluminum foil on the casserole dish. Bake the covered casserole for 20 minutes. then remove the foil and continue to cook for 20-25 minutes until well browned and no uncooked egg remains. (An inserted toothpick will come out a bit damp but should not be wet.)
After 20 minutes, remove the foil and continue to cook for an additional 20-25 minutes, The casserole will be well browned and no uncooked egg remains. (An inserted toothpick will come out a bit damp but should not be wet.)
Serve with your favorite maple syrup and confectioners sugar as toppings.