In a small bowl, whisk together the salt, baking soda, garlic powder, and dried thyme. Pat the steak dry all over, and rub the spice mixture into the surface of the steak. Refrigerate the steak on a wire rack, uncovered, for at least 5 hours or overnight. (This will tenderize and season the steak. If you don’t have time for this step, pat the steak dry and season just before cooking.)
Preheat a grill at high heat for 10 minutes with the lid down. Grill the steak with the lid up for 4-5 minutes per side, or until a thermometer reads 135F for medium rare. (To pan fry the steak, heat a cast iron pan in 425F oven for 10 minutes. Transfer the pan to a stovetop burner over high heat. Add the steak to the pan and sear 2-3 minutes per side.)
Allow the steak to rest 10 minutes before serving. While the steak rests, fry the french fries for the second time so everything is hot for serving! Serve the steak topped with a blue cheese shallot butter coin alongside the french fries, the dressed greens, and ketchup.