Peel the banana and ginger and cut into small pieces. Wash the apple and cut into small pieces. Squeeze the lemon.
Put all ingredients as well as the washed rocket and kohlrabi leaves in a bowl and puree with the stand mixer.
The ingredients for a green smoothie can be wildly combined according to your mood. The rule of thumb here is: the greener the smoothie, the healthier, so you should combine 70 percent vegetables with 30 percent fruit.