In a small bowl, whisk together the dressing ingredient and set aside.
Preheat grill to medium heat and oil lightly.
Place cantaloupe and watermelon wedges on the grill and grill for 4 minutes per side.
Transfer melons to cutting board and let cool before chopping into cubes.
Add the grilled melons and the remaining salad ingredients to a salad bowl.
Drizzle the dressing over the salad and toss to combine.