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.
04 - 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.
05 - Reduce the heat to medium. Add butter to the same skillet. Once melted, add minced garlic and sauté for 1 minute until fragrant.
06 - Pour in beef broth and scrape up any browned bits from the pan. Stir in heavy cream and bring to a gentle simmer.
07 - Add Dijon mustard and Parmesan cheese, stirring until the sauce is smooth and slightly thickened, about 2-3 minutes.
08 - Stir in chopped parsley and season with salt and pepper to taste.
09 - Slice the rested steaks and serve topped with the creamy garlic sauce. Garnish with additional parsley if desired.