How to cook
Peel the cucumber and tomato. Clean the watermelon slices form their seeds. Cut them into small pieces and put everything in the jug of a food processor.
Blend until smooth, making sure no pieces remain. If you want, you can strain the gazpacho through a strainer, I personally don't do it because I like it that way.
Leave in the refrigerator for a few hours. Serve the chilled gazpacho.