Spray 9 x 13" glass baking dish with cooking spray. In saucepan, combine all topping ingredients; mix well. Cook over medium heat until smooth, stirring constantly. DO NOT BOIL. Spread topping in sprayed baking dish. Beat eggs in bowl. Add milk, vanilla and salt; beat well. Dip each bread slice in egg mixture, making sure all egg mixture is absorbed. Place bread slices over topping in baking dish. Cover; refrigerate 8 hours or overnight. Bake at 400 degrees; uncover baking dish; 20 - 25 minutes or until bubbly and toast is golden brown. Let stand three minutes. Invert onto large serving platter; scraping any extra caramel topping from baking dish onto toast. Serve immediately! Excellent!