Preheat oven to 350°F (175°C).

Spray a 9 x 13-inch pan with Pam.

Place half of the cubed sourdough bread in the prepared pan.

Distribute the cream cheese cubes evenly over the bread.

Cover with the remaining bread cubes.

In a large bowl, whisk together eggs, maple syrup, and milk.

Add cinnamon or nutmeg, if desired, and whisk until well combined.

Pour the egg mixture over the bread and cream cheese in the pan.

Let it soak for 10 minutes.

Bake in the preheated oven for 25-30 minutes, or until golden brown and set.

Let cool slightly before serving.