Begin by spreading the cubed bread on a cookie sheet, allowing it to dry out for about 1 hour.

In a large mixing bowl, whisk together the eggs, whole milk, table salt, granulated sugar, vanilla extract, cinnamon, and nutmeg until smooth.

Grease a 9" x 13" baking pan generously. Place half of the dried bread cubes in the pan, then add any bacon or sausage if using, followed by the remaining bread cubes.

Carefully pour the custard mixture evenly over the bread, using a spatula to ensure all pieces are submerged.

Cover the pan tightly with plastic wrap and refrigerate for several hours or overnight.

Preheat your oven to 350°F (175°C). Remove the plastic wrap and sprinkle cinnamon sugar on top if desired. Bake for 60-70 minutes, or until lightly browned.

Remove from oven, let cool slightly, slice into squares, and serve warm with maple syrup or powdered sugar.