01 - Line a baking sheet with parchment paper.
02 - Peel bananas and cut into ½ inch thick rounds. Arrange on the prepared baking sheet.
03 - Place banana slices in the freezer for 30 minutes until firm.
04 - In a heatproof bowl set over simmering water, melt dark chocolate with coconut oil if using, stirring until smooth. Remove from heat.
05 - Dip each frozen banana slice into melted chocolate, coating all sides using a fork. Let excess chocolate drip off and place back on the parchment-lined sheet.
06 - Immediately sprinkle chopped peanuts onto the chocolate-coated banana slices before the chocolate sets.
07 - Repeat dipping and topping with all remaining banana slices.
08 - Freeze the assembled banana bites for at least 30 minutes until the chocolate is firm.
09 - Transfer bites to an airtight container and keep frozen until serving.