Creating Watermelon Nectarine Salad is simple if you follow these easy steps:

1. Prepare the Fruits: Start by washing the watermelon and nectarines. Remove the rind from the watermelon and cut it into cubes. Slice the nectarines, discarding the pits.
2. Dice the Cucumber: Wash and dice the cucumber into small pieces for added crunch.
3. Slice the Onion: Thinly slice the red onion to add a hint of sharpness.
4. Chop the Mint: Wash and chop the fresh mint leaves, which will provide a refreshing flavor.
5. Combine Ingredients: In a large bowl, combine the cubed watermelon, sliced nectarines, diced cucumber, and red onion.
6. Add Mint and Feta: Gently fold in the chopped mint leaves and crumbled feta cheese if using.
7. Make the Dressing: In a small bowl, whisk together the olive oil, balsamic vinegar, salt, and pepper.
8. Dress the Salad: Pour the dressing over the salad and toss gently to combine all ingredients.
9. Chill (Optional): For enhanced flavor, cover the salad and let it chill in the refrigerator for about 30 minutes.
10. Serve: Give it a final toss before serving to ensure the dressing is evenly distributed.

These steps will guide you in creating this incredible salad effortlessly.