Preheat oven to 475 degrees. Combine the rosemary and garlic. Make several 1/2-inch-deep slits in pork; place about half of rosemary mixture in slits. Rub pork with remaining rosemary mixture; sprinkle with salt and pepper. Place pork on a jellyroll pan coated with cooking spray. Insert a meat thermometer into thickest portion of pork. Bake at 475 degrees for 20 minutes or until the thermometer registers 160 degrees or desired degree of doneness. Let stand 5 minutes, and cut into 1/4-inch-thick slices.
Ready in 25 min