1-Make the dressing: Whisk together lime juice, lime zest, olive oil, honey, salt, black pepper, and sliced serrano pepper (if using) until well combined.

2-Soak the onion: Place sliced red onion in a bowl of ice water; let sit 10 minutes to mellow the sharpness, then drain well.

3-Prep the watermelon and cucumber: Cut seedless watermelon into 1-inch cubes and slice English cucumber into half-moons or cubes.

4-Tear the herbs: Roughly tear fresh mint leaves and basil leaves (if using); set aside.

5-Assemble the salad: In a large bowl, gently combine watermelon cubes, cucumber, drained red onion, and torn herbs.

6-Dress the salad: Drizzle the honey-lime dressing over the salad and toss gently until everything is lightly coated.

7-Add the feta: Sprinkle crumbled feta cheese over the top and give the salad one final gentle toss.

8-Finish and serve: If desired, drizzle balsamic glaze over the salad right before serving for extra depth; serve immediately.