In a small bowl, whisk together the olive oil, lime juice, and sugar until combined.
Season the dressing with kosher salt and freshly ground black pepper to taste.
Arrange the watermelon slices on a serving platter.
Drizzle the prepared dressing evenly over the watermelon.
Sprinkle the lime zest and torn mint leaves over the top.
Finish with a light sprinkle of flaky sea salt.
Serve immediately and enjoy this refreshing Mojito Watermelon Recipe.