Prepare the Watermelon:
Cut the watermelon into bite-sized cubes, removing the rind and seeds if necessary. Place the watermelon cubes into a large mixing bowl.
Add the Feta and Mint:
Crumble the feta cheese over the watermelon. Add the chopped mint leaves to the bowl for a burst of fresh flavor.
Make the Dressing:
In a small bowl, whisk together the olive oil and balsamic vinegar (or lime juice). Season with a pinch of salt and pepper to taste.
Toss and Serve:
Drizzle the dressing over the watermelon, feta, and mint mixture. Toss gently to combine all the ingredients.
Garnish and Serve:
Serve immediately or refrigerate for a short time to chill. Garnish with additional mint leaves if desired.