01 -
Bring a large pot of salted water to a boil. Add the pasta and cook until al dente, about 8–10 minutes. Before draining, reserve 120 ml of pasta water. Drain and set aside.
02 -
Pat the steak dry with paper towels. Season both sides evenly with salt and black pepper. Heat olive oil in a large skillet over medium-high heat. Sear the steak for 3–4 minutes per side, or until it reaches your preferred doneness. Transfer to a plate and allow to rest for 5–10 minutes.
03 -
Lower the skillet heat to medium. Add butter to the pan and melt. Stir in the minced garlic and sauté for 1–2 minutes, until fragrant and lightly golden. Add red pepper flakes at this stage, if using.
04 -
Add cooked pasta to the skillet with the garlic butter. Toss to coat, adding reserved pasta water a splash at a time to achieve a glossy sauce that clings to the noodles.
05 -
Slice the rested steak thinly across the grain.
06 -
Divide the garlic butter pasta between plates. Top with sliced steak. Garnish with chopped parsley and grated Parmesan if desired. Serve hot.