Combine the cucumbers, cantaloupe, pickled red onions, pepitas, sunflower seeds and basil in a large bowl.
Whisk together the olive oil, vinegar, salt and pepper.
Pour the dressing into the large bowl and toss to combine. (**see note for making salad ahead of time)
Season with more salt & pepper to taste.
Notes
*See this creamy cucumber salad recipe for how to make quick pickled red onions.**If making ahead of time, keep dressing in a separate container and dress the salad before serving.***Keeps, stored in an airtight container in the refrigerator for about 5 days.