- Put all ingredients for simmering sauce into a pot and bring to the boil, for 1-2 mins. Turn off heat and set aside.
- Heat oil in a pan over low heat. Spread beef slices over the bottom of pan. Pour in simmering sauce. Turn up the heat to high and simmer beef for 1 min. Add remaining ingredients and simmer for 1-2 mins or until food is cooked.
- Ladle into individual bowls and serve immediately.