Place chocolate in a microwave-safe measuring cup; microwave at HIGH 1 minute or until chocolate melts, stirring every 15 seconds.
Add melted chocolate to nut mixture, stirring until just combined.
Spread mixture evenly on a jelly-roll pan lined with parchment or foil; freeze 1 hour.
Break into pieces.
Bark should be kept in an airtight container in the fridge or a cool room. It will keep for up to 3 weeks.
Try with coconut flakes and almonds or pecans; peppermint; trail mix; candied orange peel.