01 - Remove the steaks from the refrigerator 30 minutes before cooking to bring them to room temperature. Pat dry with paper towels.
02 - Season both sides of the steaks generously with salt and pepper.
03 - Heat olive oil in a large skillet (preferably cast iron) over high heat until shimmering. Add the steaks and sear for 3–4 minutes per side for medium-rare, or until desired doneness. Remove steaks from the pan, cover loosely with foil, and rest while making the sauce.
04 - Reduce the heat to medium. Add butter to the same skillet. Once melted, add minced garlic and sauté for 1 minute until fragrant.
05 - Pour in beef broth and scrape up any browned bits from the pan. Stir in heavy cream and bring to a gentle simmer.
06 - Add Dijon mustard and Parmesan cheese, stirring until the sauce is smooth and slightly thickened, about 2–3 minutes. Stir in chopped parsley and season with salt and pepper to taste.
07 - Slice the rested steaks and serve topped with the creamy garlic sauce. Garnish with additional parsley if desired.