COOK IT.
Fire up your Nexgrill. Set up one side for direct heat and one side for indirect heat by turning half the burners on, and leaving half off.
Adjust your burner knobs until your temperature gauge reads 500º.
Place your tomahawk steak directly on the grates over direct heat (the side with burners on), and sear using a 2-2-2-2 approach, which goes like this: Sear 2 minutes, flip the steak 90º. Sear 2 minutes, flip the steak over. Sear 2 minutes flip 90º. Sear 2 minutes.
After your steak has been seared, move it to indirect heat (the side of the grill with burners off), and close the grill lid.
Leave the tomahawk over indirect heat until it's reached your desired doneness. If you’re not totally sure when the time is right, try using an electronic temperature gauge. (Rare: 120-130° F, Medium Rare: 130-135° F, Medium: 140-150° F, Medium Well: 155-165° F, Well: 170+° F).
Pull that massive hunk of meat off the grill, and let rest for 10 minutes while you lick your chops.
Top with your microgreens relish, cut into servings, and dig in!