01 -
Heat olive oil in a large Dutch oven (or heavy-bottomed pot with a lid) over medium-high heat. Add the diced onion and minced garlic. Cook, stirring occasionally, until softened, about 4–6 minutes.
02 -
Add the ground beef to the pot. Season with italian seasoning, salt, pepper, and red pepper flakes (if using). Cook, breaking up the meat with a wooden spoon.
03 -
Pour in the beef broth and crushed tomatoes. Stir to combine. Increase the heat to bring the sauce to a simmer.
04 -
Add the pasta and reduce the heat to medium. Cover the pot and cook for 9–12 minutes, stirring occasionally, until the pasta is al dente.
05 -
Remove your pot from the heat. Stir in the heavy cream and half of the Parmesan cheese. If the sauce is too thick, add beef broth 1 tablespoon at a time to reach your desired consistency. If it's too thin, cook over medium heat for a few more minutes to thicken.
06 -
Serve the creamy beef pasta immediately, topped with the remaining Parmesan cheese. The sauce will thicken slightly as it cools.