1 - Preheat the oven to 220C/425F/Gas 7 Heat the vegetable oil in a large frying pan, and brown the beef all over.

2 - (You may need to do this in batches.

3 - ) Set aside, then brown the kidneys on both sides in the same pan.

4 - Add the onions and cook for 3-4 minutes.

5 - Return the beef to the pan, sprinkle flour over and coat the meat and onions Add the stock to the pan, stir well and bring to the boil.