01 - In a large mixing bowl, add the cubed watermelon, diced cucumber, thinly sliced red onion, and chopped fresh mint leaves.
02 - In a small mixing bowl, whisk together extra-virgin olive oil, freshly squeezed lime juice, sea salt, and ground black pepper until well combined.
03 - Pour the lime dressing over the salad components and gently toss with a large spoon to evenly coat.
04 - If desired, sprinkle crumbled feta cheese on top just before serving.
05 - Serve promptly to ensure optimal freshness and flavor.