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.
02 - While the pasta cooks, heat a large skillet over medium-high heat. Add ground beef seasoned with salt and black pepper. Cook, breaking apart with a wooden spoon, until fully browned and no pink remains. Drain excess fat and transfer beef to a plate.
03 - In the same skillet, melt butter over medium heat. Add minced garlic, Italian seasoning, and crushed red pepper flakes. Sauté for approximately 1 minute, stirring frequently, until fragrant. Avoid browning the garlic.
04 - Return the browned ground beef to the skillet. Add the drained pasta and toss to coat evenly. Gradually incorporate reserved pasta water, a splash at a time, until the sauce clings to every strand.
05 - Sprinkle grated Parmesan cheese over the pasta and toss until melted and evenly distributed. Taste and adjust seasoning with additional salt and pepper as needed.
06 - Remove from heat. Top with chopped fresh parsley and serve immediately while hot.