Heat the oil and fry the onion rings until soft. Add the tomatoes and soya mince.
Remove the membrane from the liver. Cut the liver into strips as thick as your little finger. Season with Steak & Chop Spice. In a separate pan, heat oil and stir-fry until the liver is just done. Add extra sunflower oil if necessary. Combine the cooked liver strips and tomato, onion mixture.