Fill a large pot with water and add a generous amount of salt. Bring the water to a rolling boil. Add the fettuccine (or your choice of pasta) and cook according to the package instructions until al dente. Once cooked, drain the pasta and set it aside in a large bowl.
In a spacious skillet, heat the olive oil over medium heat. Add the finely chopped onion and sauté for approximately 2-3 minutes, stirring frequently until the onions become soft and translucent.
Increase the heat to medium-high and add the ground beef to the skillet. Using a wooden spoon, break up the meat as it cooks for about 5-7 minutes until it is fully browned. If there is excess fat, drain it carefully.
Stir the minced garlic and Italian seasoning into the beef mixture, cooking for an additional minute.
Pour in the beef broth, stirring well to ensure everything is combined. Lower the heat to simmer the mixture for 5 minutes.
Gradually stir in the heavy cream and then add the freshly grated Parmesan cheese. Continue to mix until the cheese is fully melted and the sauce has a creamy consistency. Taste the sauce and season with salt and freshly ground black pepper to your liking.
Carefully add the cooked pasta to the skillet with the creamy beef sauce. Toss the pasta gently but thoroughly, ensuring each strand is luxuriously coated in the sauce.
Dish out the creamy beef pasta while it's hot. Garnish each serving with a sprinkle of finely chopped fresh parsley.