I just cooked my roast using this recipe. Well, I am here to tell you that it came out perfect. I would like to try the next one without foil with less time. I had a 4lb roast and did the 6 minutes. I will try 3 mins per pound covered and 10 minutes uncovered. Then cover it up and leaved in for the two hours with oven off. I will let you know how it comes out.

This method will not work for all ovens. If your oven uses a convection fan, it may cool too quickly. There are many recipes, such as cheesecake, that rely upon an oven maintaining it's temperature. Maybe turn down temp to 350?