If using fresh cherries wash and weigh them out
Pit them. Frozen cherries are already pitted
Put them on a cookie sheet and freeze them. Of course if you are using already frozen fruit, you don't need to do any of this. Thus the 5 minute part.
Put the frozen fruit, yogurt, and sugar into a blender or food processor and pulse until it's soft and creamy.
During the last few pulses add in the bits of chopped chocolate. That's it. It's done. Serve it up, you've got ice cream baby!