Heat the grill in a way that one side is hotter than the other.
Season with the salt generously and season less abundantly with the pepper.
Put the steak on the hotter side first and grill until a solid crust starts to develop on each side which should take about 3 minutes per side, depending on how hot your grill is.
Transfer to the lower heat side of the grill and grill for about 5 minutes per side, or until the internal temperature is about 125 degrees.
Remove steak from the grill and cut the meat from the bone. Slice steak against the grain.
Mix all the sauce ingredients well in a bowl. Serve as a dipping dauce or pour on the steak.