Slice the banana into 0.5cm thick pieces.
Spread Greek yogurt evenly.
Place the sliced bananas on top without overlapping.
Melt dark chocolate using a double boiler or microwave.
Drizzle or spread the melted chocolate over the bananas.
Sprinkle chopped nuts or granola on top (optional).
Place on parchment paper and freeze for 2-3 hours.
Cut into bite-sized pieces.