Lightly coat bread with cooking spray. Place bread on a baking sheet; broil 2 minutes on each side or until toasted. Remove from oven.
Reduce oven temperature to 350°.
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.
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