Preheat an oven to 400 degrees. Toss the butternut squash in the olive oil and spread in an even layer on a baking sheet. Roast for about 25 minutes or until tender. Remove from the oven and cool.
In a large mixing bowl, combine the cooled squash, quinoa, cranberries, onion, and pumpkin seeds. Toss well to combine.
For the Dressing
In a blender, combine all ingredients. Blend on high until smooth. Drizzle half the dressing over the salad and toss to combine.
Serve the salad with additional dressing on the side if desired.