This breed is also not usually found in pet stores Number Eight and Nine is the American and the American Satin Guinea Pig. They are the most common breed of Guinea Pigs as well as one of the oldest close to Abyssinian. There hair is straight back and sleek.
Insert the meat thermometer into the thickest part of the roast and put the roast in the oven. Cook rump roast for at least 1 hour and 40 minutes for rare. Make sure that the internal temperature of the meat is at least 120 F before removing from the oven.
Season the roast, sear it in hot oil and cook it in a 250 degree Fahrenheit oven for roughly 30 minutes per pound. One of the keys to keeping it tender is to slice it very thin just as you find in a delicatessen. In fact, if you purchase roast beef in a deli, there is a good chance you are getting rump roast.