Season the steaks on all sides with kosher salt, pepper, and steak seasoning.
Cook according to one of these methods first:Traeger/ pellet grill: Set the Traeger to 200 degrees and place the steak on the grill grate for 35 to 40 minutes.Oven: Place the steaks on a wire baking rack over a baking sheet and place them in a 200 degree oven for 35 to 40 minutes.
While the steaks are in the Traeger or oven, make the garlic chive butter by mixing together the butter, chives, and garlic in a bowl. Set aside.
During the last few minutes of cook time in the Traeger or oven, preheat the Blackstone to high. Remove the steaks once they are at 110 degrees for medium doneness.
Add some vegetable oil to the hot Blackstone griddle and cook the steaks about 2 minutes per side. Remove them when they are 140 degrees for medium doneness.Note: They will continue cooking slightly even after removing them.
Let the steaks rest before serving with the garlic chive butter.