Heat the fat in the pan, fry the meat, then season with salt. Then remove the meat and set it aside in a bowl. Heat the fat in the pan again. Add the onion and steam until soft. Add the garlic, paprika, curry, ketchup and possibly Tabasco and steam briefly. Deglaze with white wine and meat stock and bring to the boil. Mix the sour cream and cornstarch, add to the sauce and simmer. If necessary, add paprika, curry, ketchup and salt to taste. Add the meat and stew for approx. 1 hour.
Serve with rice, spaghetti, spaetzle or noodles.
Can also be prepared a day in advance. Put in the fridge overnight. It tastes even better then.