Cook the Pasta:
In a large pot, bring salted water to a boil. Cook the rotini pasta according to the package instructions until al dente. Drain and set aside.

Cook the Beef:
In a large skillet, heat the olive oil (or butter) over medium heat. Add the ground beef and cook until browned, breaking it apart as it cooks. Once browned, drain any excess fat.

Prepare the Garlic Parmesan Sauce:
Add the minced garlic to the skillet with the cooked beef and sauté for about 1 minute, until fragrant. Sprinkle the flour over the beef and garlic, stirring to combine. Cook for another 1-2 minutes to eliminate the raw flour taste.

Add the Milk and Seasonings:
Slowly pour in the milk, stirring constantly to create a smooth sauce. Add the grated Parmesan cheese and Italian seasoning. Continue stirring until the sauce thickens and the cheese melts into the sauce. Season with salt and pepper to taste.

Combine Pasta and Sauce:
Add the cooked rotini pasta to the skillet and toss to coat the pasta in the creamy garlic Parmesan sauce. Heat for an additional 2-3 minutes until everything is well combined and heated through.

Serve:
Garnish with fresh chopped parsley and serve hot. Enjoy your creamy Beef and Rotini in Garlic Parmesan Sauce!