ox-tongue pastry" (牛脷酥) - similar but with more dough and lightly sweetened - with the same set of filling would have fared better in terms of bringing a better balance of flavor and texture.
More photos: https://www.flickr.com/photos/g4gary/albums/72157662611997969
When? January 8 2016
Where? MO Bar, Landmark Mandarin Oriental, Queen's Road Central, Hong Kong
Menu Highlights? Banh Mi Trap Dog
MO Bar: www.mandarinoriental.com.hk/landmark/fine-dining/mo-bar
PDT NYC: pdtnyc.com