Preheat your oven to 350°F (180°C) and grease a 9x13 inch baking dish.

In a large mixing bowl, combine sugar, vanilla extract, ground cinnamon, ground nutmeg, and salt. Whisk together before adding the eggs, then whisk in the eggnog until smooth.

Cut the stale bread into cubes and place them in the greased baking dish. Pour the custard mixture over, tossing to coat evenly.

Cover with aluminum foil and let it soak for 30 minutes at room temperature.

Remove foil and bake in the preheated oven for 45-55 minutes until puffed and set. Check doneness with a knife.

Allow to cool for 20-30 minutes before serving. Dust with powdered sugar and serve with your choice of toppings.