Prep the Base: Line a baking sheet with parchment paper.
Melt the Chocolate: Place a heatproof bowl over a medium pot of simmering water (without touching the water). Add the chopped chocolate and stir until fully melted (about 5 minutes).
Spread & Decorate: Pour the melted chocolate onto the baking sheet, smoothing it into an even ¼-inch thick layer. Sprinkle with your toppings of choice.
Set & Serve: Sprinkle with sea salt and freeze until firm (at least 20 minutes).
Break & Enjoy: Once hardened, break the bark into pieces and serve!