Meanwhile, bash the slices then season the meat and dust with flour.
Remove salonna lumps, then fry the slices in the salonna fat. Cook for a few minutes each side until browned then set aside. (pork leg will cook quickly so dont allow to overcook).
Add the onions and a large pinch of salt to the pan and cook for 4-5 minutes (the liquid that releases from the onions will deglaze anything left from frying the pork slices from the pan).
Add the garlic and cook for a further minute, making sure the garlic doesnt burn. Then add the sliced mushrooms along with the reserved szalonna pieces.
Add the TV Paprika and the tomatoes, and the sweet Hungarian paprika and stir well.
Return the cooked pork slices to the pan, along with any resting juices.
Add just enough water or chicken stock to the pan to almost cover the pork slices. Simmer very gently for 10-15 minutes until the pork is tender.
Meanwhile make a sour cream slurry by mixing the sour cream with the flour. Add some liquid from the pan and whisk well to remove any lumps.
Stir in the sour cream slurry into the meat and mushroom sauce. and simmer for 3-4 minutes.
Serve with nokedli and few extra dollops of sour cream.
Notes
Mixing in the slurry is a lot easier if you remove the meat for a few minutes, and add the meat back in once the sauce is mixed.