01 -
Season the steak cubes generously with salt and freshly ground black pepper.
02 -
Heat olive oil and 30g butter in a large pot or Dutch oven over medium-high heat. Sear the steak cubes until nicely browned on all sides, about 3-4 minutes. Remove from pot and set aside.
03 -
Reduce heat to medium and add remaining 30g butter and minced garlic to the same pot. Cook until fragrant, about 30 seconds, being careful not to burn the garlic.
04 -
Add pasta, heavy cream, red pepper flakes, salt, and pepper to the pot. Add enough water to just cover the pasta. Bring to a boil, then reduce heat and simmer, stirring occasionally, until pasta is al dente, about 8-10 minutes.
05 -
Stir in the Parmesan cheese and most of the chopped parsley, reserving some for garnish. Return the cooked steak to the pot with any accumulated juices. Gently combine and cook for 1-2 minutes until the pasta is fully cooked and sauce has thickened slightly.
06 -
Transfer to serving plates while hot, garnish with remaining parsley, and serve immediately.