Prepare Your Baking Sheet: Start by lining a baking sheet with parchment paper.
Melt the Chocolate: In a microwave-safe bowl, combine the dark chocolate chips and coconut oil. Heat in the microwave for 30-second intervals, stirring between each session until melted.
Arrange the Banana Slices: On the prepared baking sheet, lay out the banana slices in a single layer.
Pour the Chocolate: Drizzle the melted chocolate mixture generously over the banana slices.
Add Your Toppings: Evenly sprinkle the chopped nuts, shredded coconut, and optional mini marshmallows over the chocolate-covered bananas.
Finish with Sea Salt: Lightly sprinkle a pinch of sea salt over the entire bark before it sets.
Chill to Set: Place the baking sheet in the freezer and chill for 1-2 hours, or until the chocolate has hardened.
Break Into Delicious Pieces: Once set, remove the bark from the baking sheet and break it into pieces.
Notes
Serve on a decorative platter or wrap in cellophane for gifts.