Prepare the marinade. Whisk together garlic - fresh lime juice until smooth. Add the pork, cover and marinate for 30 minutes.

Preheat oven to 425 degrees F.

Heat oil in a large saute pan over medium heat. Remove the pork from the marinade, reserving the marinade. Add the pork and sear on all side until browned about 7-8 minutes. Remove pork from heat and transfer to a roasting pan. Continue cooking in the oven until the internal temperature register 160 degrees, about 15-20 minutes. Remove from oven and let rest for 10 minutes. Slice the pork tenderloin.

While the pork is roasting, pour the reserved marinade into a small saucepan. Bring to a boil over medium heat, stirring constantly. Pour sauce over the pork tenderloin and serve.