Making this bark (simply a sheet of chocolate studded with toppings) couldn't be easier: You can mix up a batch in about 5 minutes before chilling in the fridge.
Lightly coat an 8-inch pan with cooking spray. Line with parchment paper, leaving a small overhang. Pour in chocolate and smooth with a spatula into an even layer.
Sprinkle with pistachios and sea salt. Chill in fridge until completely set, about 30 minutes. Peel off parchment, and break into pieces.
Try different combinations of toppings: nuts, dried fruit, unsweetened coconut, orange zest, or candied ginger.