Mix the ingredients for the marinade well. Cut the meat into thin strips and marinate for at least 1 hour.
Peel the onions and cut into half rings. Wash the spring onions and cut the white and light green parts into rings. Peel and finely chop the garlic. Wash the chilli, cut in half lengthwise, remove the seeds and cut into fine strips.
Heat the oil in a pan and fry the onions until golden and remove.
Heat the sesame oil in the pan and fry the marinated meat for 3 minutes and then remove. Fry the spring onions and garlic in the pan for 30 seconds and then pour on some soup and the remaining marinade. Mix cornflour in a little water and thicken the sauce with it. If it becomes too thick, add soup.
Add the meat and onions. Season with salt and pepper and serve sprinkled with chillies.