Make small slits in the tenderloin and insert the garlic slivers; set aside

In a large bowl, combine all the remaining ingredients; mix well. Add the tenderloin, cover, and marinate in the refrigerator for at least 6 hours or overnight.

Preheat the oven to 425°F. Coat a roasting pan with nonstick cooking spray. Remove the meat from the marinade and place in the pan, discarding the marinade.

Roast the meat for 35 to 40 minutes for medium-rare or to desired doneness. Allow to sit for 15 minutes before slicing crosswise to serve.