Cut or tear all the leaves into about 1 inch pieces and add to the blender.
Peal banana and add it, as well as the remaining ingredients, to the blender.
If your blender has a frozen drink setting, use it for this. Otherwise pulse on high for 3 second bursts until the majority of the leaves are chopped. Then blend on high for about 1 minute until well blended.
Add a handful of ice and blend again for 1 minute until ice is complete blended.