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