Preheat the grill to 400°
While the grill is heating, season steaks with steak seasoning and worcestershire sauce, letting it rest at room temp for about 15 minutes.
Grill the steaks for about 8 minutes per side, or until about 145° for medium.
Pull the steak off the grill and let it rest for 10 minutes, loosely covered with foil
While the steak is resting, add all of the ingredients for the chimichurri to a food processor or blender. Pulse/blend until smooth.
Slice the steak and spoon chimichurri over top or serve on the side.