Rest the steaks. Take the steaks out of the refrigerator and set them on the counter while you preheat your grill for two-zone grilling with an overall temperature of 350 degrees F. Combine all ingredients for the steak seasoning in a small bowl until well combined. Season the steaks on all sides with the steak rub.
4 6 ounce filet mignon steaks, 2 teaspoons black pepper, 2 teaspoons Kosher salt, 1 teaspoon ground coriander, 1 teaspoon garlic powder, 1 teaspoon onion powder, 1/2 teaspoon cayenne pepper
Grill the filets. Place steaks on grill grates over indirect heat, close lid, and cook for approximately 30 minutes, until the steaks are 10 degrees away from your target temperature, flipping once halfway through. (Rare = 115 degrees F, Medium Rare = 125, Medium = 135, Medium Well = 145, Well = 150 degrees F).
Sear your filet mignon. Transfer your filets to the direct heat side of your grill to sear for a 2-3 minutes per side, or until the steaks reach your preferred target internal temperature. (Rare = 125 degrees F, Medium Rare = 135, Medium = 145, Medium Well = 155, Well = 160 degrees F).
Rest, serve, and enjoy. Remove the steaks to the serving platter and rest for 5-10 minutes before slicing and serving.