Preheat the oven to 400 degrees. Line a baking sheet with parchment paper and lay out the butternut squash noodles. Coat lightly with cooking spray and season with salt and pepper and roast for 8-10 minutes or until cooked through but still al dente.While the squash cooks, combine all of the ingredients for the vinaigrette and set aside.Spiralize the pear and add to a large mixing bowl with the arugula and walnuts. Once butternut squash is done, add it to the large bowl, drizzle over the vinaigrette and toss thoroughly.Serve immediately.