It's really amazing that a simple dish like this could be packed with layers and layers of intensified flavours. Distinct wok-hei taste from the hor fun, a good hearty portion of tender beef slices, good old bok choy to give that needed crunch, all of that drenched in the savoury eggy-flavoured sauce. Taste palates were just begging for more with every mouth full of that beef hor fun. Add on a few slice of the red chilli padi/green chilli slices to get that extra heat.