01 - Line a 9x13-inch baking sheet with parchment paper, ensuring the edges are covered.
02 - Evenly arrange the banana slices in a single layer across the parchment, slightly overlapping to create full coverage.
03 - In a microwave-safe bowl, combine the chopped chocolate and coconut oil. Microwave in 20-second intervals, stirring after each burst, until smooth and fully melted. Alternatively, melt gently over a double boiler.
04 - Pour the melted chocolate evenly over the arranged bananas, using a spatula to spread and cover the entire surface.
05 - Immediately sprinkle the roasted nuts, mini chocolate chips, shredded coconut, and flaky sea salt over the wet chocolate layer.
06 - Transfer the tray to the freezer and chill for at least 1 hour, or until the chocolate is completely firm.
07 - Remove from the freezer and break into irregular bark pieces. Serve immediately or store in an airtight container in the freezer.