01 - Bring a large pot of salted water to a boil. Add the fettuccine and cook until al dente according to package instructions. Reserve 1/2 cup 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 to 2 minutes until fragrant without browning.
03 - Pour in the heavy cream and bring to a gentle simmer. Cook for 3 to 4 minutes, stirring occasionally.
04 - Lower the heat to low and gradually whisk in the grated Parmesan until smooth and creamy. Season with black pepper, sea salt, and nutmeg if using.
05 - Add the drained fettuccine to the skillet and toss to coat thoroughly. If the sauce is too thick, stir in some reserved pasta water to adjust consistency.
06 - Plate immediately, garnishing with chopped parsley and additional Parmesan as desired.