In a large bowl, whisk the eggs.Then add the milk, sugar, cinnamon, vanilla extract, nutmeg, and salt. Pour the mixture over the cubed breadcrumbs, and cover the dish with plastic wrap. Refrigerate for at least 30 minutes (longer if possible).
5 large eggs, 4 cups whole milk, 1 cup granulated sugar, 2 teaspoons pure vanilla extract, 1 teaspoon ground cinnamon, 1 teaspoon ground nutmeg, ½ teaspoon salt