Creating Beef and Garlic Butter Pasta is seamless when you follow these steps:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add pasta and cook according to package instructions until al dente. Reserve 1/2 cup of pasta water and then drain the rest.
2. Cook the Beef: In a large skillet over medium-high heat, melt 2 tablespoons of butter. Once hot, add beef strips. Season with salt and pepper. Cook until browned and cooked through, about 5-7 minutes. Remove from the skillet and set aside.
3. Sauté the Garlic: In the same skillet, add the remaining butter. Once melted, add minced garlic and red pepper flakes, if using. Sauté for about 1-2 minutes or until fragrant, being careful not to burn the garlic.
4. Combine with Pasta: Add the cooked pasta to the skillet. Toss to coat in garlic butter. If the pasta seems dry, add some of the reserved pasta water until desired consistency is achieved.
5. Add the Beef: Return the cooked beef to the skillet and toss well to combine all ingredients. Cook for an additional minute to heat through.
6. Garnish and Serve: Remove from heat. Garnish with chopped parsley and serve hot, topped with grated Parmesan cheese if desired.

These steps ensure that your Beef and Garlic Butter Pasta comes together effortlessly, delivering incredible flavor in every bite.