Cook the pasta according to package instructions until al dente. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
Stir in the minced garlic and cook for an additional 1 minute.
Add the pumpkin puree, heavy cream, dried sage, and dried thyme to the skillet. Stir well to combine and let it simmer for about 5 minutes.
Season with salt and pepper to taste.
Add the cooked pasta to the skillet and toss to coat it evenly with the creamy pumpkin sauce.
Stir in the grated Parmesan cheese until melted and well combined.
Serve immediately, garnished with fresh parsley.