Preheat oven to 170 ° C .
Remove fat and cuticle of the veal shank. Peel the onions and vegetables and cut into large pieces. Rub veal shank with paprika, sear all around in the oil, remove and salt. Fry vegetables, onion and bay leaf in the frying residue, add the white wine, bring to the boil and add the veal shank. Simmer about 1 1/2 in oven until tender. If necessary, pour in the soup.
Wash mushrooms and cut in half or quarters if necessary . Sauté in butter, season with salt and pepper and sprinkle with parsley.
Cut veal shank into pieces and serve with the vegetables and mushrooms .