I remember Moogie making potato cakes from the potatoes left over from Thanksgiving. I doubt Moogie's mashed potatoes contained as much cream and butter as the potatoes Jason made for Christmas this year. At any rate the potato cakes from the left over Christmas potatoes were even better than those I remembered. Soft and very smooth on the inside, crispy on the outside. The ultimate "comfort food".
These will only be as good as the left over potatoes you start with. Form potatoes into cakes and fry in butter or a mix of butter and olive oil until the cakes are heated through and browned on both sides.