Let the roast set on the counter for 3 - 4 hours or until room temperature to ensure an even cook.
Preheat the oven to 500 degrees F.
In a mixing bowl, whisk together the butter and remaining ingredients until smooth.
Rub the roast with the mixture so it is evenly coated on all sides. Place the roast, rib side down, in a dish or roasting pan. Generously sprinkle the top with additional sea salt.
Roast for 30 minutes (5 minutes per pound). Then turn off the oven. Let the roast set in the oven for 2 hours - DO NOT open the oven door during this time.
Remove the roast from the oven and check the temperature - it should be in the 120 - 125 degree range. Lightly cover with tinfoil and let for 5 - 10 minutes. During this time the internal temperature will rise slightly to bring it to the medium-rare range, roughly 130 degrees F.
Slice against the grain and serve warm.
