The tenderloin is the leanest cut of pork. Black-eyed peas and the monounsaturated fat in avocados help regulate glucose.
Heat broiler, with rack in top position. In a medium bowl, combine black-eyed peas, avocado, scallions, parsley, and lime juice. Season with salt and pepper and mix well.
Rub pork with oil and season with salt and pepper. Place on a rimmed baking sheet lined with foil. Cook 10 to 12 minutes for medium, turning frequently (an instant-read thermometer should read 145 when inserted in center of pork). Let rest 10 minutes. Thinly slice pork and serve with salad and any cooking juices from sheet.