01 - Preheat oven to 425°F. Position rack in the center.
02 - In a small bowl, combine garlic, rosemary, thyme, parsley, kosher salt, black pepper, and 2 tablespoons olive oil. Mix thoroughly to form a cohesive paste.
03 - Pat steaks dry with paper towels. Rub the garlic herb paste evenly over both sides of each steak. Allow to rest at room temperature while preparing the broccolini.
04 - On a large baking sheet, toss trimmed broccolini with 2 tablespoons olive oil, kosher salt, and black pepper. Spread in an even single layer for optimal caramelization.
05 - Roast broccolini for 15 to 18 minutes until tender with lightly charred edges. Remove from oven and immediately toss with lemon zest and fresh lemon juice. Set aside and keep warm.
06 - Heat a large cast-iron skillet or heavy-bottomed pan over high heat until smoking. Sear steaks in batches if necessary, 2 to 3 minutes per side for medium-rare. Adjust time for preferred doneness.
07 - During the final minute of cooking, add unsalted butter to the pan. Tilt the skillet and continuously spoon melted butter over the steaks to baste and build a rich, flavorful crust.
08 - Transfer steaks to a cutting board and rest for 5 minutes to allow juices to redistribute throughout the meat.
09 - Arrange steaks alongside the roasted lemon broccolini. Garnish with additional fresh herbs and lemon wedges. Serve immediately.