Trim off excess fat from the meat with a sharp knife.
In a small bowl, mix garlic, rosemary, thyme, salt and pepper.
Rub the mixture over the meat to coat. Set meat aside
Place beef on hot rack and close lid; grill for about 5 minutes. Turn meat and close lid; grill until well-seared on second side, another 5 minutes.
Move meat to the charcoal grill's cool side.
Cook until a meat thermometer inserted in the thickest section registers 130 degrees for rosy pink, 45 to 60 minutes.
Let meat rest 15 minutes before serving. Serve on a serving platter.
Notes
Tenderloin steak is very rich in proteins which makes you feel full if you are following a special diet. It is also very yummy and tender because of the low content of connective tissues.