Coat each of the banana slices in the yogurt and put onto a lined baking sheet.
Place the baking sheet into your freezer and freeze for 2 hours.
Melt the chocolate in a small pan or in the microwave. Allow to cool slightly.
Coat each of the frozen slices into the chocolate and return to the baking sheet.
Once all the slices are covered, freeze until the chocolate has set, about 2 hours.
Notes
You need to make sure the banana and yogurt is really frozen before you take it out and dip it into the chocolate. Otherwise the yogurt will melt and start to harden the chocolate. This first step will take about 2-3 hours and then once dipped in chocolate you need to freeze for another 2 hours.
You can do half dipped in chocolate and half just dipped in yogurt like we have.
You don't have to dip them in chocolate, you can just drizzle it on top, which means you can use less and you also don't have to worry about the yogurt melting into the chocolate dip.
Leave these out of the freezer for 2-3 minutes before biting into them so the yogurt and banana softens a little.