Seasoning    
Light Soy Sauce     1 tbsp
Sugar       1/2 tbsp
Corn Flour       2 tbsp
Oil       2 tbsp
Water        1 tbsp
Shaoxing wine        1 tbsp
Pepper       some
Sesame Oil      some

Sauce 
Tomato Ketchup      3 tbsp
Worcester Sauce      1/2 tbsp
Sugar       2 tbsp
Chicken Powder     1/2 tbsp
Light Soy Sauce      1 tbsp     
Corn Flour     1/3 tbsp
Water        6 tbsp
   

Steps
1)   Slice fillet into bite sizes across the vertical grain 
2)   Slightly press by chopper then marinated by seasoning (1) for 30 minutes
3)   Remove seeds of tomato, shred, also shred the onion
4)   Heat wok with 4 tbsp of oil, fry steak fillet in medium heat 
5)   Dish up steak when fillets are almost cooked
6)   Heat wok again with 2 tbsp of oil, stir fry onion
7)   Add in shredded tomato, stir fry well, add sauce
8)   Add in steak while sauce is boiled, stir fry well, dish up and serve             
  

Remark 
tbsp -     table spoon