Add ground beef to the skillet, breaking it apart as it cooks until browned, about 7 minutes. Season with salt, pepper, and Italian seasoning.
Lower heat and stir in heavy cream. Gradually add reserved pasta water until desired sauce consistency is reached. Mix in grated Parmesan until melted.
Combine cooked pasta with the sauce in the skillet, tossing gently to coat.
Serve hot, garnished with additional Parmesan or fresh parsley if desired.
Notes
Quick tip: if the sauce looks too thick, add more of the reserved pasta water a few tablespoons at a time.