Place tenderloin in shallow roasting pan. Cover with foil and bake for 25 minutes. Remove from pan, place on carving board, and tent loosely with foil and let it rest.
While loin is resting, heat oven to broil.
Arrange trimmed broccoli rabe in a single layer on a baking sheet, drizzle with olive oil, season with salt and pepper, and toss to coat.
Broil for 5 minutes, turn over, and cook for another 3-4 minutes or until tender and slightly charred.
Remove broccoli rabe from oven and serve with sliced tenderloin.