Warm the peanut butter for 30 secs in the microwave
Slice the bananas roughly a 1/4 inch thick and place on a baking paper lined tray
Spread 1/2 teaspoon of the warmed peanut butter onto the banana slices.
Place the sandwiched bananas into the freezer for at least 2 hours.
Melt the dark chocolate and coconut oil in the microwave for 10-20 seconds at a time.
Take the bananas out the freezer and dip into the melted chocolate and place back on the cold baking paper
Pop back into the freezer on the tray. After 15 minutes you can trasfer to a freezer bag and keep them stored in there and take them out as and when required.