- Combine the watermelon and onion in a bowl.
- Toss lightly.
- Whisk the lime juice, oil, mustard and salt into 1/4 cup of the watermelon juice.
- Drizzle over the salad.
- Before serving, garnish with the mint leaves and rocket leaves.
- Scatter the cheese on top.
Image credit: flickr.com/photos/ricepot/4526130024/