Prep the watermelon: Cut into small, even cubes. Aim for about 6–8 cups for a family bowl.
Keep it chilled until mixing for the best texture and flavor.
Slice the cucumber (optional): Halve lengthwise and slice into half-moons. Pat dry with a towel to avoid watering down the salad.
Chop the herbs: Stack mint or basil leaves, roll them up, and slice thinly. Keep a few whole leaves for garnish if you like.
Make a quick dressing: In a small bowl, whisk together 1–2 tablespoons lime (or lemon) juice, 1–2 teaspoons olive oil, and 1 teaspoon honey if using.
Taste and adjust to your preference.
Combine gently: In a large bowl, add watermelon and cucumber. Drizzle over the dressing and toss gently with a spatula.
Add feta and herbs: Crumble in the feta and sprinkle with mint or basil. Toss once or twice—don’t overmix or the feta will smear.
Season lightly: Add a tiny pinch of salt only if needed and a quick grind of black pepper if desired.
Serve right away: This is best cold and fresh.
For kids, keep portions small and colorful. You can also set aside some plain watermelon on the side for hesitant eaters.