01 - In a large salad bowl, combine the cubed watermelon, sliced strawberries, blueberries (if using), and chopped mint.
02 - In a small bowl or jar, whisk together the lime juice, honey, lime zest, olive oil, and a pinch of sea salt until well combined.
03 - Pour the honey lime vinaigrette over the fruit and gently toss to coat all the pieces evenly.
04 - If desired, sprinkle with crumbled feta cheese just before serving.
05 - Serve immediately, or chill for up to 1 hour for a colder salad.