Prepare the watermelon by cutting it into bite-sized one-inch cubes and removing any large black seeds.

Thinly slice the red onion. Soak the slices in cold water for ten minutes if the flavor is too sharp.

Wash the arugula and spin it dry to avoid diluting the dressing.

In a small glass jar, combine olive oil, lime juice, honey, salt, and pepper. Shake until emulsified.

In a large wooden salad bowl, place the arugula at the bottom. Arrange the watermelon cubes and red onion slices over the greens.

Drizzle half of the dressing over the salad and toss gently with tongs.

Sprinkle crumbled feta and sliced mint leaves over the top. Add remaining dressing if needed.

Finish with a crack of black pepper and serve immediately.