01 - Line a rimmed baking sheet with parchment paper, ensuring the paper lies flat across the entire surface.
02 - Peel the bananas and cut them into ¼-inch thick rounds. Arrange the slices in a single, slightly overlapping layer on the prepared sheet, forming a rough rectangular shape approximately 8×10 inches.
03 - Place the chopped chocolate in a microwave-safe bowl and heat in 20-second intervals, stirring thoroughly between each burst, until the chocolate is completely smooth and glossy.
04 - Pour the melted chocolate evenly over the arranged banana slices. Use a spatula to spread gently, ensuring every banana coin is fully covered.
05 - Drizzle the peanut butter over the chocolate surface, then scatter the chopped roasted nuts, mini chocolate chips or cacao nibs, and a generous pinch of flaky sea salt across the top.
06 - Transfer the baking sheet to the freezer and chill for at least 45 to 60 minutes, or until the chocolate is completely firm and hardened throughout.
07 - Remove from the freezer and break the bark into irregular pieces by hand, or use a sharp knife to cut into neat squares. Serve immediately directly from the freezer for the crispiest texture.