This elegant pasta dish features tender fettuccine coated in a velvety Alfredo sauce made from butter, heavy cream, and a blend of Parmesan and Romano cheeses. A lightly beaten egg yolk enriches the sauce, giving it a silky texture, while a dash of pepper and nutmeg adds subtle warmth and depth. Finished with fresh parsley for brightness, this recipe delivers a timeless balance of creamy, savory, and aromatic flavors—perfect for a cozy dinner or a special occasion.