| 1 | Slice the beef into 50mm slices. |
| 2 | Make onion rings with 1 ?onions and chop remainder. |
| 3 | Mix together the vinegar, salt and pepper in a bowl and marinate beef for 1 hour. |
| 4 | Heat the oil in a frying pan and when hot add the curry leaves, chopped onion and cinnamon stick. |
| 5 | When fragrant add the beef and marinade. |
| 6 | Gover pan and cook over a low heat till the beef is tender. |
| 7 | Remove the beef and set aside. |
| 8 | Add the onion rings to the pan and stir fry for a couple of minutes. |
| 9 | Add the mustard, stock, sugar and chilli powder and mix well. |
| 10 | Put back the beef slices and cook for a further 2-3 minutes. |
| 11 | Remove the cinnamon stick before serving |
