Use a chef's knife and cutting board to dice the watermelon into small, uniform cubes and slice the cucumber into thin rounds.
2 cups watermelon, diced
Transfer the diced watermelon and sliced cucumber into a large mixing bowl, ensuring an even distribution of ingredients.
2 cups watermelon, diced
Crumb the feta cheese using your fingers or a fork and sprinkle it over the fruit and vegetables in the bowl.
2 cups watermelon, diced
Gently toss all ingredients together using a large spoon or spatula until well combined, ensuring the feta and produce are evenly distributed.
2 cups watermelon, diced
Transfer the salad to a serving plate or bowl and sprinkle generously with flaky sea salt just before serving for added flavor contrast.
2 cups watermelon, diced