**Cook the Pasta:**
Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente. Reserve 1/2 cup of pasta water before draining the pasta.
**Sauté Onion and Garlic:**
Heat olive oil in a large skillet over medium heat. Add the onion and cook until softened, about 3-4 minutes. Stir in the garlic and cook for an additional 1 minute.
**Cook the Nduja:**
Add the nduja sausage to the skillet, breaking it up with a spoon. Cook for 3-4 minutes, allowing it to melt and infuse the oil with its spicy flavors.
**Deglaze with Wine:**
Pour in the white wine and stir, scraping the bottom of the skillet to release any browned bits. Let it simmer for 2 minutes.
**Make the Creamy Sauce:**
Reduce the heat to low and stir in the heavy cream. Simmer gently for 3-4 minutes, then stir in the Parmesan cheese until melted and smooth.
**Combine Pasta and Sauce:**
Add the cooked pasta to the skillet, tossing to coat it in the sauce. If needed, use the reserved pasta water to loosen the sauce to your desired consistency.
**Season and Serve:**
Season with salt and black pepper to taste. Garnish with fresh parsley, red pepper flakes, and extra Parmesan cheese if desired. Serve immediately.