Combine first 6 ingredients in a large bowl, stirring with a whisk. Add bread, pressing down with a spatula to soak. Spoon bread mixture into a 2-quart baking dish coated with cooking spray. Bake at 350° for 50 minutes. Drizzle with caramel syrup, and sprinkle with nuts. Bake an additional 5 minutes or until caramel syrup is bubbly.