Gonna share a very simple recipe: potato lángos.
1. boil potato (you can peel it first, or after boiling doesn't matter)
2. when cooked, let it cool
3. break up the potato, add salt and flour, then mix them well; the potato:flour ratio is about 2:1; some people add eggs I'm not sure how much
4. portion out the dough so when a portion flattened it's about a size of a pancake/palatschinke/blini.
5. fry them in a pan in a bit lard or oil
It can be eaten as is, or add variety of stuff, mix some crushed garlic with oil or lard and spread it over, or add sour cream, or cheese, or all the above, or fry onions and use it as toppings, or whatever.

Essentially this is poverty food, but can be used to utilize leftovers. For example today I left a bit of mashed taters (taters, salt, butter, milk) at lunch, and made potato lángos out of that for dinner. For me the ratio was in reverse about 1:2, I also added grated cheese to the mix, and a bit more salt. I fried it on a round slab of iron/steel we call platni (from some German word, probably platten) placed over the flame of the gas stove. I smeared lard on it, just about a point of a knife.
My lángos' were about the size of my palm, I didn't flatten them precisely just by hand. At first as they fry they stick a bit to the platni, they need to be moved a bit, then they don't stick there again. When they were ready I spread a bit lard on them and sprinkled a pinch of salt. Also ate couple of radishes.