Bring a large pot of salted water to a boil. Cook the pasta according to package instructions until al dente. Reserve about 1/2 cup of pasta water, then drain the pasta and set aside.

Heat a large skillet over medium-high heat. Season steak pieces generously with salt and pepper. Add the steak to the skillet and sear each side for about 2-3 minutes or until browned and cooked to desired doneness. Remove the steak and set aside.

In the same skillet, reduce heat to medium and add butter. Once melted, add minced garlic and sauté for about 1 minute until fragrant, but not browned.

Pour in the heavy cream while stirring constantly. Add grated Parmesan cheese, mixing until melted and smooth. If sauce is too thick, add reserved pasta water to adjust consistency.

Return the cooked steak and drained pasta to the skillet. Toss everything together until well-coated in the creamy garlic butter sauce. Adjust seasoning with additional salt and pepper if needed.

Once combined, garnish with fresh parsley and enjoy your delicious meal!