Preheat oven to 350˚F. Spray a large casserole dish (10x15") or lightly grease with butter.
Cut the sliced bread into 1 inch cubes and place in a large bowl.
In a mixing bowl whisk the eggs, then add the eggnog, vanilla, cinnamon, nutmeg and salt. Mix well.
Pour egg mixture over the bread. Stir just to coat evenly.
Turn into prepared baking pan.