Pre heat BBQ grill to HIGH.
Mix salt and garlic together in a small bowl.
Fully wet your hands with very COLD water.
Press spice mixture into the entire surface of the meat.
Sear roast on lightly oiled grill for 4 minutes each side to lock in juices.
Remove roast and place on a platter.
Cover the surface of the roast with the chopped garlic cloves.
Return roast to BBQ and place on the TOP/UPPER grill with a roasting pan underneath on the lower grill to catch drippings.
Insert a meat thermometer into the center of the roast and allow to cook until it reaches an internal temperature of 130°F for rare or 140°F for medium rare.
Move the roast directly to a cutting board, loosely tent with foil for 10 minutes to let juices settle. The internal temperature will increase another 10 degrees during this time.
Carve with grain and serve.