01 - Bring a large pot of salted water to a rolling boil. Add pasta and cook according to package directions until al dente. Reserve 1/2 cup of starchy pasta water before draining through a colander. Set drained pasta aside.
02 - While the pasta cooks, heat a large skillet over medium-high heat. Add ground beef seasoned with salt and black pepper. Cook, breaking the meat apart with a wooden spoon, until fully browned and no pink remains. Drain any excess rendered fat and transfer the beef to a plate.
03 - In the same skillet, melt the butter over medium heat. Add minced garlic, Italian seasoning, and crushed red pepper flakes. Sauté for approximately 1 minute, stirring frequently, until the garlic becomes fragrant. Take care not to let the garlic brown or burn.
04 - Return the browned ground beef to the skillet with the garlic butter. Add the drained pasta and toss thoroughly to coat. Gradually incorporate small splashes of the reserved pasta water, stirring continuously, until the sauce reaches a silky consistency that clings to the noodles.
05 - Sprinkle grated Parmesan cheese over the pasta and toss until melted and evenly distributed throughout. Taste and adjust seasoning with additional salt and pepper as needed.
06 - Remove the skillet from heat. Scatter chopped fresh parsley over the top and serve immediately while hot.