Armed with some advice from a query I posted to Serious Eats, we decided to attempt to recreate the crispy, potato-cheesy goodness.
We used the leftover garlic mashed potatoes from last week's steak dinner (they were too gluey to eat anyway!) and mashed in some shredded cheeses (we had some chedder, swiss and mozzerella in the fridge -- but it would appear that more authentic would have been farmers cheese), and fried onions chopped small.
The dough (as usual) started to get a bit melty in the poorly ventilated kitchen. And we ate them all before we got a chance to take the end result pictures, but we got a good one of filling them up:
The little bundles got wrapped up, forked tight, boiled, browned and served with some sour cream.
Not nearly as crisp and puffy as the ones at Veselka, but not a bad first attempt. Definitely a noble cause for leftover mashed potatoes.