Heres a good way to use leftover pot roast - with its juices and any leftover vegetables. Its a very flexible, use-what-youve-got soup so its hard to go wrong. If you dont have homemade beef stock (butchers arent giving away bones anymore), soup base is tastier than regular bullion. I like the Tones brand you can get at Sams Club. Note: I couldnt get the recipe editor to accept leftover vegetables as an ingredient, but if youve got some hanging out in the fridge throw them in.