Clean and wash the leek and cut into rings. Drain the bamboo shoots and tangerines. Cut the bamboo into strips. Wash and pat dry the schnitzel, cut into wide strips. Fry the meat vigorously in the hot oil. Season with salt and pepper, remove. Briefly fry the leek and bamboo in the frying fat. Dust the curry and flour and sauté. Gradually pour in the broth, some tangerine juice and cream. Boil. Add the meat and simmer everything over a low heat for about 5 minutes. Finally add the mandarins and heat. Rice tastes very good with it.