Remove steak from the refrigerator 30–45 minutes before cooking; pat dry.
Season generously with kosher salt and black pepper (or apply marinade 2–4 hours in advance).
For Grilling: Preheat grill to 450–500°F. Grill steak 4–5 minutes per side for medium-rare.
For Pan-Searing: Heat cast-iron skillet until smoking. Add oil, then sear 3–4 minutes per side. Optionally baste with butter.
For Reverse Sear: Preheat oven to 275°F. Cook steak on a wire rack until internal temp reaches 115°F. Finish by searing in a hot skillet until crust forms.
Remove steak when it’s 5°F below target temperature (125°F medium-rare, 130°F medium).
Rest 5–10 minutes before slicing.
Slice thinly against the grain and serve with sauces or sides.