Instructions

• Preheat the oven to 375°F (190°C).
• Pat the 1 lb top sirloin steak dry. Season both sides evenly with 1/4 tsp salt and 1/8 tsp pepper.
• Heat a large cast-iron skillet over medium-high heat until very hot. Add 1 tbsp olive oil and heat until the oil is shimmering.
• Place the steak in the skillet and sear, undisturbed, for 3 minutes.
• Flip the steak and sear the second side for 1 minute.
• Turn off the burner. Immediately place 1 tbsp salted butter, 2 tsp minced garlic, and 3 sprigs fresh rosemary on top of the steak.
• Transfer the skillet with the steak to the preheated oven. Cook for about 5–7 minutes, or until a meat thermometer inserted into the thickest part reads your desired temperature (about 135°F for rare or 140–145°F for medium).
• Remove the steak from the oven and transfer it to a cutting board. Let it rest for 10 minutes to allow the juices to redistribute.
• Slice and serve the steak as desired.