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 and emulsified.
03 - Pour the honey lime vinaigrette over the fruit mixture and gently toss to coat all pieces evenly, being careful not to mash the delicate fruit.
04 - If desired, sprinkle with crumbled feta cheese just before serving. Serve immediately or chill for up to 1 hour for a colder salad experience.