1. Wash spinach thoroughly, cut off thick stems. Wash the cucumber and roughly dice. Cut the prunes into quarters. Peel and grate the ginger.
2. Put all these ingredients into a blender with the soluble oats, apple and lemon juice and blend until smooth. Dilute with a little mineral water if necessary and add maple syrup to taste.
3. Pour the smoothie into glasses.

To Serve: Thread thin cucumber slices and one prune onto a skewer and serve it with the smoothies.

Tip: You could use pear or quince juice instead of apple juice.