When I was in high school Mom worked as a cook in the restaurant kitchen at the South Bend Farmer's Market. Every Saturday they served old fashioned Roast Beef and Roast Pork. Everything there was homemade and simply delicious.
This roast pork dinner was my favorite. It was served with real mashed potatoes and homemade dressing. Fresh vegetables were used most of the year.
Place roast in roaster or large roasting pan. Pour water into bottom of pan. Cover and cook at 325 degrees until internal temperture of meat on meat thermometer reaches 155 degrees. This should take 1 1/2- 2 1/2 hours depending on the roast you have chosen. When roast reaches 155 degrees remove from pan, strain drippings, and reserve broth. Allow roast to sit for about 20 minutes before slicing.
Meanwhile make gravy. Dissolve cornstarch in water. Pour into roasting pan where some drippings remain. Stir until well blended. Add remaining ingredients except mushrooms. Bring to a boil and cook until clear and thickened. Add mushrooms. Serve gravy over sliced meat, mashed potatoes and homemade bread dresing. (See separate recipe for dressing.)