My mom used to make hash out of left over beef roast and potatoes. Cube and boil the potatoes. Sautee some onion and the beef in a skillet. Drain cooked potatoes and add with some beef broth. Salt and a good amount of black pepper. Cover and steam. The starch will release from the potatoes and make somewhat of a gravy. Finish by cooking uncovered until you get the consistency you like.
My favorite consistency: “Should tear a cat head biscuit clean in half when you drag it through the hash.” :)
Pretty much Irish Stew with beef instead of mutton and no carrots.
Now, THAT, will make your tongue slap your brains out,...deeelicious!!