Preheat the oven to 500 degrees F (260 degrees C).
Season roast with salt and pepper; place in a roasting pan or baking dish. Do not cover or add water.
Place roast in the preheated oven and reduce temperature to 475 degrees F (245 degrees C). Roast for 21 minutes (7 minutes per pound), then turn off the oven and let roast sit in the hot oven for 2 1/2 hours. Do not open the door at all during this time.
Remove roast from the oven and check that the internal temperature is at least 145 degrees F (65 degrees C). Carve into thin slices to serve.