01 - Pat steaks completely dry with paper towels to ensure proper searing. Brush both sides generously with olive oil.
02 - Combine kosher salt, black pepper, minced garlic, and rosemary in a small bowl. Rub mixture evenly over all surfaces of the steaks, pressing gently to adhere.
03 - Prepare gas or charcoal grill to high heat, targeting 450–500°F for optimal searing.
04 - Place seasoned steaks directly on hot grill grates. Cook 4–5 minutes per side for medium-rare doneness. Use instant-read thermometer to verify internal temperature: 130°F for medium-rare, 140°F for medium.
05 - During the final minute of grilling, top each steak with ½ tbsp unsalted butter, allowing it to melt and baste the meat.
06 - Transfer steaks to cutting board or platter. Tent loosely with aluminum foil and rest 5 minutes to allow juices to redistribute throughout the meat.
07 - Serve steaks immediately with lemon wedges on the side.