1 tablespoon extra-virgin olive oil, plus more for brushing
1 tablespoon packed light-brown sugar
Coarse salt and freshly ground pepper
1/2 cup grated Parmesan cheese (about 2 1/2 ounces)
1/2 cup chopped fresh flat-leaf parsley
1/2 cup chopped fresh cilantro
on a rimmed baking sheet. Roast until tender, about 45 minutes. Let cool slightly on sheet on a wire rack, about 10 minutes.
2. Scrape squash with a fork to remove flesh in long strands. Place in a large bowl. Add oil, Parmesan, parsley, cilantro, hazelnuts, 1 teaspoon salt, and pepper to taste. Toss, and serve immediately.