Love this recipe, unlike others similar, no corn starch added, corn starch is totally unnecessary and not used in traditional Thai food. Also mant don't say to use fish sause, which this one does, which any Thai coom knows is essential. Only thing I did different was to marrinade beef in a crushed galic clove and a bit of soya sauce. Would also suggest using a little more beef than recipe says, at least another 100g when you are feeding hungry mouths.
It's simple and really tasty and true to authentic Thai food.