Leftover Roast Beef Stroganoff from Food.com: If you have left over cooked roast and don't know what to do with it, here is a nice little recipe I found in Taste of Home. I like to add a few tablespoons of sour cream just before serving, but it is up to you.
I clipped this recipe years ago and adapted it to use my leftover beef roast and steaks. Just chop up any leftover beef, throw it in a freezer bag and store until you have enough to make the soup. Also, save your leftover broth. It really makes the soup rich and flavorful. Great for a cold winter day!