Heat oven to 350 degrees.
Place the pork loin in a shallow roasting pan.
Drizzle with olive oil
Rub the meat with the garlic, rosemary, onion powder, salt and pepper.
Pour the wine into the bottom of the pan.
Cook for 1 hour or until the internal temperature (use a meat thermometer) reaches 145 degrees.
remove the pork loin from the oven and let rest for 10 minutes (put foil over the roasting pan to lock in the moisture) before slicing and serving.