Heat oven to 350F. Coat a 2-quart nonstick baking dish with cooking spray. Place cubed bread in baking dish and set aside. Combine milk, egg sub, brown sugar, vanilla, and brandy and pour over bread cubes in dish. Bake for 35-40 minutes, or until set. Cool on wire rack for 10 minutes. Lightly dust with convectioners' sugar, if desired.