1. Preheat broiler.
2. Lightly coat bread with cooking spray. Place bread on a baking sheet; broil 2 minutes on each side or until toasted. Remove from oven.
3. Reduce oven temperature to 350°.
4. Sprinkle chocolate evenly over bread slices. Bake 4 minutes or until chocolate melts. Sprinkle evenly with salt. Garnish with orange rind, if desired. Serve warm.