Excuse my wording, i never really read recipes and wrote this in a rush from my mom's notes. You know it's good because it's written by a local and it's messy.
You put a packet of yeast and a teaspoon of sugar into 3dl lukewarm(microwaved) milk.
You hint a small amount of flour on the top and let it rise in a warm place (we put it on the radiator).
Separete to that:
Get 1 egg, and the kefir.
Mix with 2 coffee spoon of baking soda, 1 kilogram of flour and a handful of salt (2 table spoons), in a big bowl. On top of that you'll pour the milk mixture you just made when that has risen enough. You'll have to mix this together with hands, until it's big, round and you can't mix it anymore. When you're done with the mixing, leave it in the bowl, cover the top of it with a lid and let it rise for 90 minutes. (AKA don't touch it). Recommended to leave it in a warm place again, or table, idk. After that you'll need to mix it again with hands so it goes back to a smaller form, then leave it for another 30 minutes. If that's done, you'll need to put it in the fridge and only bake it next day.
You'll put oil on a tray, grab a desired amount of dough and flatten it by hand. It doesn't need to be thin, just flat. You'll put that in boiling oil and cook on both sides unil it's nice and brown.
The dough will stay good in fridge for a week, it's recommended to have the lángos fresh.
As a topping we like to put crushed garlic mixed in oil, sour cream and grated cheese.
Of course you can put bacon and whatever else on it, but that in my household counts as a crime. (At least for me. I like it in the origial form. Lángos are beautiful. Live Laugh Lángos.)
Enjoy!