Cut the banana into bite-sized pieces.
Melt dark chocolate in the microwave or using a double boiler.
Spread the melted chocolate thinly on parchment paper.
Evenly place banana pieces and peanuts on top of the chocolate.
If needed, drizzle a little more chocolate on top.
Chill in the refrigerator for at least 30 minutes until set.
Cut into bite-sized pieces.