A very good way to use up left-over mashed potatoes as well as ROAST BEEF is to combine them and make a cottage pie. In this dish, mashed potatoes take the place of the crust that is generally put over the top of a meat pie. If well seasoned and served hot, it makes a very palatable dish.
To make a cottage pie, cover the bottom of a baking dish with a 2-inch layer of well-seasoned mashed potatoes. Over this spread left-over ROAST BEEF cut into small pieces. Pour over the meat and potatoes any left-over gravy and a few drops of onion juice made by grating raw onion. Cover with a layer of mashed potatoes 1 inch deep. Dot with butter and place in a hot oven until the pie has heated through and browned on top. Serve hot.
Woman’s Institute Library of Cookery, Vol. 3
Volume 3: Soup; Meat; Poultry and Game; Fish and Shell Fish (Year 1928)