Healthy and simple choice.

Wash the kale and spinach if it is not already triple washed.

Put all the ingredients into a blender and blend until smooth. (I didn't add any ice to my smoothie but if you want to increase the volume and chill the drink down, go ahead and add a few ice cubes.)

TIPS:
You can try a few modifications, such as green Tea as a liquid instead of the milk. Add apple and an extra banana etc if you wish.