Cut your stale bread into 1 inch cubes, and put in a large bowl.
In another large bowl, add eggs, sugar, half and half, vanilla, cinnamon, and nutmeg. Then, whisk to combine.
Pour these wet ingredients over the cubed bread, and gently stir to coat all the bread cubes. This will seem like a lot of liquid, but the dry bread will absorb more than you think!
Let this sit at room temperature for 10 minutes. Don't skip this step, this is what lets all the flavor infuse into the bread cubes.
During this soaking period, preheat your oven to 350*F.
Prepare a 9x13 baking pan, by spraying it with non stick oil, even up the sides.
Once the soaking period is up, pour the entire mixture into the prepared baking sheet.
Bake for 50-60 minutes until the center appears set and not jiggly. I like to temp the center just to make sure I am above the 165*F safety cooking level for the eggs as well.
Once done baking, let it cool for 15-20 minutes, then drizzle on half the vanilla glaze sauce.