1) Cut the beef slices into sections. Wash the tomatoes and make a cross on top with a knife. Bring water to boil. Add tomatoes and cook for 3 minutes. Dish up and peel off the tomato skin. Cut into wedges.
2) In another pot, put the beef slices into boiling water for 10 seconds. Drain and dish up.
3) Heat oil to boil. Stir fry the ginger slices and garlic cloves. Add tomato and stir well. Cook until the tomato sauce is made. Add light soy sauce and oyster sauce. Add water and cook to boil.
4) Add the beef slices and cook for 3-5 minutes. Season with salt and ground white pepper. Sprinkle with chopped spring onion. Ready to serve.