I made a really yummy and easy roast tonight. I've done this twice now and it has turned out perfectly each time.
You preheat your oven to 500, put your roast in a baking dish, rub it down with steak rub or salt and pepper or whatever, put it in the oven and reduce the temperature to 475. Let it cook for 7 minutes per pound (about 17 minutes for the ones I normally get at Costco) and then shut off the oven. DO NOT OPEN THE DOOR. Just let it sit in there for two and a half hours.
Take it out and carve it into thin slices and eat it.
It always comes out perfectly cooked and tender and juicy. Yum!
(This is freakishly Martha of me, is it not?)