Arrange the chilled watermelon cubes evenly on a serving platter.
Sprinkle the crumbled feta cheese over the watermelon, distributing it evenly for visual contrast and flavor.
Tear the fresh mint leaves into small pieces and scatter them across the salad for a burst of color and aroma.
Drizzle the lemon juice evenly over the salad, ensuring all ingredients receive a touch of brightness.
Season lightly with salt and pepper to taste, then gently toss or serve immediately for a fresh appearance.
Optional: Garnish with additional mint leaves or lemon slices for presentation before serving.