Preheat the grill and brush or spray with oil to prevent sticking.
While the grill is heating remove the seeds and skin and slice into 8 wedges. Place on the grill and cook for 3 minutes per side or until grill marks form.
While the cantaloupe is cooking combine all of the vinaigrette dressing ingredients in the mason jar, cover and shake until mixed well.
Once the cantaloupe is ready slice the wedges in half to make them thinner, lay them on the bed of arugula and top with the torn prosciutto, crumbled goat cheese, and walnuts. Drizzle with the vinaigrette.