Set oven to 350 degrees F. Salt and pepper roast on both sides. Put meat rack in roasting pan or Dutch oven. Put roast in roasting pan on top of rack.
Add water to pan until it comes up to 2/3 on side of roast. Pour A.1. Steak Sauce on top of roast. Use a fork to level out the sauce across the roast (should be thick). Get the first packet of onion soup mix and put in the water around the roast. Get the second packet and put on top of the roast (make sure it is even). Add the first onion and put in the water around the roast. Add the second onion on top of the roast(scatter evenly).
Put in oven for 2 hours with roasting top covered. At the end of 2 hours flip the roast oven and cook for 1 more hour with roasting top covered. At the end of the 3rd hour remove roast from pan.
Pour the gravy in a microwave Pyrex dish. Heat the gravy mixture for 2-3 minutes in the microwave. Prepare cornstarch and water to use as a thickener for the gravy. (Do as many times you desire to thicken gravy.) Heat in microwave to desired consistency. Serve roast and rice and gravy.