Preheat your grill to 300°F on the main grill grates.
Season your steak liberally on all sides with your favorite seasoning.
Once the grill is preheated, place your steak on the grates and let it cook for 15-20 minutes, flipping every 5 minutes, until it reaches 110°F internal temperature.
While the steak is grilling, preheat your infrared burner to medium-high heat.
Once your steak reaches 110°F, remove it from the main burners and transfer it to the infrared burner.
Cook for 3-5 minutes, flipping every minute, to build crust, until the steak reaches 135°F (for medium rare).
Remove the steak from the burner and let it rest at room temperature for 10-15 minutes. Slice and serve immediately.
Notes
Guide for steak doneness:
Rare - grill until 100°F then sear until 120°F
Medium rare - grill until 110°F then sear until 135°F
Medium - grill until 115°F then sear until 140°F
Medium well - grill until 130°F then sear until 150°F
Well done - grill until 145° then sear until 160°F