01 - Pat steaks completely dry with paper towels. Brush both sides generously with olive oil to ensure even searing.
02 - Combine kosher salt, freshly ground black pepper, minced garlic, and dried rosemary in a small bowl. Rub the mixture thoroughly over all surfaces of the steaks.
03 - Heat gas or charcoal grill to high temperature, reaching 450–500°F for optimal searing conditions.
04 - Place seasoned steaks directly on the hot grill grates. Cook for 4–5 minutes per side to achieve medium-rare doneness. Use an instant-read thermometer to verify internal temperature: 130°F for medium-rare or 140°F for medium.
05 - During the final minute of grilling, place ½ tablespoon of unsalted butter on top of each steak, allowing it to melt and infuse flavor.
06 - Remove steaks from grill and tent loosely with aluminum foil. Let rest for 5 minutes to allow juices to redistribute throughout the meat.
07 - Serve steaks immediately while hot, accompanied by fresh lemon wedges if desired.