01 - Line a 9x13 inch baking sheet with parchment paper, ensuring the edges are fully covered for easy removal.
02 - Evenly arrange the banana slices in a single layer across the parchment, slightly overlapping each piece to create full coverage with no gaps.
03 - Combine the chopped chocolate and coconut oil in a microwave-safe bowl. Microwave in 20-second intervals, stirring thoroughly after each burst, until the mixture is smooth and completely melted. Alternatively, melt gently over a double boiler, stirring continuously.
04 - Pour the melted chocolate evenly over the arranged banana slices. Use a spatula to spread the chocolate into a uniform layer, ensuring all bananas are fully covered.
05 - Immediately scatter the roasted nuts, mini chocolate chips, shredded coconut, and a pinch of flaky sea salt over the wet chocolate surface. Press gently so the toppings adhere.
06 - Transfer the baking sheet to the freezer and chill for at least 1 hour, or until the chocolate is completely firm and hardened throughout.
07 - Remove from the freezer once fully set. Break the bark into irregular pieces by hand or with a knife. Serve immediately or store in an airtight container in the freezer for up to 2 weeks.