Chill your fruit: For the crispest texture, refrigerate the watermelon, berries, and cucumber for at least 30 minutes before assembling.
Cut the watermelon: Cube or ball the watermelon into bite-size pieces. Aim for uniform size so every bite feels balanced.
Prep the mix-ins: Slice the strawberries, rinse the blueberries, and dice the cucumber.
If using pineapple or mango, cut into small cubes.
Whisk the dressing: In a small bowl, whisk lime juice, orange juice, honey, and ginger until the honey dissolves. Taste and adjust sweetness or acidity.
Toss gently: In a large bowl, add the watermelon, berries, cucumber, and optional pineapple or mango. Pour over the dressing and gently toss with a big spoon or your hands.
Add the finishing touches: Sprinkle in the chopped mint and lime zest.
Add a tiny pinch of flaky sea salt to sharpen the flavors.
Optional cheese: If using feta or mozzarella, fold it in carefully at the end to avoid crumbling too much.
Serve cold: Transfer to a chilled bowl or platter and serve right away for the best crunch and flavor.