Coat a 9"x13"-inch pan with cooking spray or butter. Cut bread into inch-thick slices and arrange in bottom of prepared pan. In a large bowl, whisk together eggs, egg whites, half & half, milk, sugar, vanilla, cinnamon and salt and beat until blended. Stir in cranberries, if desired. Pour over sliced bread, covering evenly. Cover with foil and refrigerate overnight.

To serve, preheat oven to 350 degrees F. Remove foil and bake for 40 minutes, until puffy and golden brown. Sprinkle each serving with cinnamon and serve with real maple syrup, honey or applesauce.