Preheat oven to 400 degrees. On a sheet tray lined with foil, lay prosciutto slices flat. Transfer baking sheet to oven and roast for 10 minutes or until dried and crispy. Allow to cool.
In a small bowl, combine olive oil, balsamic, honey, and mustard. Mix until combined and season with salt and pepper.
In a large bowl, combine arugula, pears, cranberries, and Roquefort. Pour the dressing over the salad and toss until the salad is evenly coated. Top with stumbled crispy prosciutto. Serve immediately.