New Obsession, but expensive obsession

I have a new culinary obsession lately. Its this Vietnamese dish called Bo Luc Lac. Its beef in a dark flavorful brown sauce, served with lettuce, scallions and white rice. The beef is so tender, and I just found out its made from Filet Mignon (of course! *slaps forehead at my expensive tastes*). That'll explain the price. It ain't cheap. Ive eaten it a few times this past week, and several times during the summer. But I had to have it again.

I have to look up the recipe and attempt to make it on my own (although I can't really keep using filet mignon cuz I'm not rich, but my taste buds seem to think so!) But if I boil the beef in the marinade slowly for a few hours it should be tender and I can just use regular beef cubes as opposed to filet mignon. I usually dont have luck with asian recipes. They never taste authentic when I make them. I follow the directions but I think that most of the recipes were written by suburban housewives in Wisconsin or something and not by someone from that ethnicity. I'm kind of at a loss here. Just wanted to give my new fave dish a shoutout cuz its probably the last time I'm gonna be buying it for a while. Back to the grind in 2010.