1: Cook the Pasta

1. Bring a large pot of salted water to a boil, then cook the penne pasta as directed on the package.
2. Drain the pasta and set it aside.

2: Sauté the Aromatics

1. Heat a large skillet over medium heat and melt the butter.
2. Add the chopped onion and minced garlic, sautéing for about 2-3 minutes until the onion turns translucent and fragrant.

3: Cook the Ground Beef

1. Add the ground beef to the skillet and cook it thoroughly, breaking it apart with a spoon as it browns.
2. Once the beef is thoroughly cooked, drain any excess fat if necessary.

4: Prepare the Sauce

1. Stir in the Italian seasoning and optional red pepper flakes for added spice.
2. Pour in the heavy cream and beef broth, then bring the mixture to a gentle simmer.

5: Combine and Finish

1. Add the cooked penne pasta to the skillet, tossing it with the sauce until every piece is well-coated.
2. Let the mixture cook for an additional 2-3 minutes to ensure the pasta is warmed through.

6: Serve

1. Serve the cheesy penne warm and garnish with shredded cheese, if desired.