✓ Prepare the watermelon by cutting it into bite-sized cubes, removing any seeds or membranes.

✓ Slice the peaches evenly and peel them if necessary.

✓ Chop the red onion thinly for a mild sharpness.

✓ In a small bowl, mix olive oil with balsamic vinegar to create the dressing.

✓ Combine watermelon, peaches, and red onion in a large mixing bowl.

✓ Fold in feta cheese and chopped mint leaves.

✓ Drizzle the prepared dressing over the salad, then season with salt and pepper.

✓ Taste test and adjust seasoning as needed before serving.