01 - Bring a large pot of salted water to a rolling boil. Cook the pasta according to the package directions until al dente. Reserve 1/2 cup of the pasta cooking water, then drain the pasta.
02 - Melt the butter in a large skillet over medium heat. Add the minced garlic and sauté for 1 minute until fragrant but not browned.
03 - Pour in the heavy cream and bring to a gentle simmer. Cook for 2 to 3 minutes, stirring occasionally to avoid scorching.
04 - Whisk in the grated Parmesan, black pepper, and nutmeg if using. Continue simmering for 2 to 3 minutes until the sauce thickens slightly.
05 - Add the drained pasta to the skillet and toss thoroughly to coat with the sauce. Adjust the sauce consistency by adding reserved pasta water a little at a time if needed.
06 - Taste and season with salt as required. Serve immediately topped with chopped fresh parsley and extra Parmesan cheese.