Remove the beef from the refrigerator about 30 minutes before roasting. Set a roasting pan on the lowest oven rack; preheat the oven to 425 degrees F. Using a paring knife, make deep slits all over the roast and between each of the ribs; insert a garlic sliver into each slit and poke it just beneath the surface. Grind 2 tablespoons salt, the peppercorns, rosemary and bay leaves in a spice grinder (or crush and finely chop with a knife). Combine with the olive oil and rub all over the roast.
Carefully place the roast in the hot roasting pan fat-side up (bones on the bottom). Roast until an instant-read thermometer inserted into the thickest part registers 120 degrees F for medium rare, 1 hour 50 minutes to 2 hours. Transfer the roast to a platter or cutting board, tent loosely with foil and let rest 30 minutes before carving.
Carving Tips: Position the roast so the bones are pointing up. Using a chef's knife, remove the bones in one piece, then thinly slice the meat against the grain.