Lay a layer of onion rings in the bottom, then a layer of meat, season with salt, and sprinkle with a few peppercorns.
Keep layering the meat and onion like this until both are used up, finishing with a layer of onion on top.
Drizzle with the red wine.
Cover tightly, and braise over very low heat for 1-1.5 hours, until the meat is completely tender - shake the pot rather than stir it, so the layers don't get mixed together.
Lift it onto the platter in layers when serving, and drizzle generously with sour cream.
Based on: Malatinszky Fanny szakácskönyve (a classic Hungarian cookbook), modernised. Calories and protein are estimated.