Watermelon Feta Salad with Blueberries

1 Arrange rinsed arugula on a plate or two plates if serving individually. Place the watermelon balls/cubes on top. Thinly slice radishes and add them to the salad. 
2 Crumble the feta cheese with your fingers and sprinkle it on the salad. If your feta cheese is too soft, put it under very cold running water for about 10 seconds. This will firm it up. Sprinkle the salad with blueberries.
3 Prepare the dressing: mix olive oil, lime juice, soy sauce, sesame oil, ginger, and chilli flakes in a jar, close it and shake it well. Season with salt and pepper to taste. You can adjust the amount of chili flakes according to your taste. Pour the dressing just before serving. Sprinkle the salad with sesame seeds. Serve and enjoy!