Prep Time: 5 Minutes
Cook Time: 20 Minutes
Total Time: 25 Minutes
1. Remove steaks from refrigerator and let rest (about 30 minutes), bringing to room temperature before cooking. Pat dry with paper towels and season with salt and pepper to taste.
2. Heat butter with olive oil in heavy skillet over high heat. When bubbles from butter begin to subside, add steaks. Sear 1 minute on each side. Lower heat to medium and cook another 2 minutes on each side (or to desired degree of doneness).
3. Remove steaks from skillet and cover to keep warm. Turn heat to medium-high under skillet. Add onion and sauté briefly. Deglaze with brandy, being careful not to flame it (or if you do flame it, use caution). Let brandy reduce slightly, then add cream and Dijon. Bring to boil and let cook about 3 minutes, until thickened.
4. When steaks are ready to slice, move them to cutting board and cut into very thin slices across the grain of the beef. Pour any juices from steaks into sauce, make sure sauce is heated through, then spoon over sliced steak. Serve immediately, garnishing with chopped parsley if desired.