Peel the bananas and cut them into small pieces. Your banana should be ripe but firm and not mushy.
Add peanut butter and bananas to a bowl and stir well using a spatula. Add the maple syrup or honey and Greek yogurt. Stir gently to combine.
Line a baking sheet with parchment paper and make 12 clusters with your spoon—place in the freezer for 2 - 3 hours or overnight.
cover with chocolate and serve
Melt the chocolate with oil and stir in chopped peanuts. Take the clusters from the freezer and dip them in melted chocolate. Place back on the parchment paper and leave to set for 5 minutes, then serve. If you plan on doing them in about an hour, place them in the fridge; otherwise, store them in the freezer.