Season all sides of the tomahawk with kosher salt, pepper, and steak seasoning blend.
Place the tomahawk in your smoker or pellet grill set to 225 degrees for 45 minutes to 1 hour, or until internal temperature reaches 110 degrees.
Remove the tomahawk from the smoker or pellet grill at exactly 110 degrees, let it rest while your Blackstone or flat top griddle preheats to medium high/ high.
Add cooking oil of choice and the tomahawk to the griddle, cook 2 to 3 minutes per side for medium rare to medium doneness, I also used tongs to sear the edges.
Let it rest for at least 10 minutes before serving.