Cook quinoa according to package directions in chicken stock instead of water; set aside to cool.Preheat the oven to 450F.Drizzle butternut squash with olive oil and mix to coat evenly. Lightly season with salt and pepper. Roast on a baking sheet for 20 minutes or until knife tender. Cool and chop into bite size pieces.In a large bowl, combine the cooked quinoa, butternut squash, carrots, cucumber, green bell pepper, spinach, basil and sunflower seeds. Mix in the Orange Vinaigrette and season with salt and pepper, if necessary.Chill, covered in the refrigerator for 30 minutes before serving.Whisk all ingredients until combined.