1. In a small bowl, whisk together the olive oil, lemon juice, and kosher salt.
2. In a large bowl, add the honeydew, cantaloupe, and mint. Pour on the dressing and gently toss until evenly coated. Transfer to a serving platter or bowl.
3. Top with the pistachios and garnish with a few mint leaves. Finish with a sprinkle of flaky sea salt and enjoy!