Steps
1. Peel the banana and cut it in small pieces.
2. Cut the grapes in half.
3. Peel the mango and cut it in small pieces.
4. Peel the watermelon, discard the seeds and cut it in small pieces.
5. Put all the fruits in a blender, together with grated ginger.
6. Add some cold water and blend until you obtain a smooth and homogeneous smoothie.
7. Pour the smoothie in a glass and enjoy!