Panettone French Toast Casserole

Arrange bread in overlapping layers in a 2 1/2-to 3-quart baking dish. In a large bowl, whisk together eggs, milk, vanilla, salt, cinnamon, and nutmeg until thoroughly combined. Pour egg mixture evenly over bread; press with palms to fully submerge. Cover and let stand at room temperature 1 hour.

Preheat oven to 350 degrees. Bake until puffed, golden brown on top, and set, 45 to 50 minutes (if browning too quickly, tent with foil). Let stand 10 minutes, then serve, dusted with confectioners' sugar and drizzled with maple syrup.