Uses for leftover potatoes from a pot-roast I made a large pot-roast with sweet onion, carrots, green beans, mushrooms and Yukon Gold potatoes (all cooked in the same pot).  All the vegetables except for the potatoes got devoured, so now I have a lot of leftover, slightly beefy, potatoes.  What would be a good use for them?
Turn into mashed potatoes for tomorrow night's dinner?

If you have some roast left, too, cut it down into bite-sized bits, add back in some more vegetables, and turn it into a sort of shepard's pie-type meal.  (stew-like dish covered with mashed potatoes, then baked)