Peel and chop the bananas. Pop them in your blender. Add a 1cm slice of ginger (or more if you want an extra warming hit of ginger in your smoothie). Zest and juice in half the lemon.

Add 1 tbsp tahini, the spinach, 300ml of the maple water and some ice. Blitz till smooth. Taste and add more lemon or tahini if you like.