The flour is mixed with carbonated water, salt and pepper. The meat is placed in the resulting mixture and stirred therein. In a deep pot pour 2 cm sunflower oil, heat and put the meat to fry small portions of 3-4 minutes until browned. Fry the meat is put to drain on kitchen paper. The sauce is prepared, as the oil is heated, add the tomato puree, stir 1 minuta and pour the vinegar, soy sauce, water and sugar. Once the boil a bit removed from the heat. Before serving, put the meat in the sauce and sprinkle with coriander.