Mmmm yum! I don't like to play favorites but this is consistently best food truck in vegas.
Its no secret that foodtrucks are popping up all over the place. Alot of people think its a gimmick but Fuku is here to prove them wrong. LIke many places, fuku serves up that "fusion" burger, - traditional american food with a Asian twist. All of their burgers have Japanese influences (fuku means lucky in Japanese), from pickled ginger, chicken katsu sandwiches, wasabi mayo, whatever, these burgers are pretty different that what you can find else where.
The truck travels around vegas, but you find their schedule on their website - http://fukuburger.squarespace.com/schedule/ and they are pretty good to sticking to their sched unlike some other foodtrucks which never show up or dip out early. Definitely worth checking out is the buta burger (bacon cheese burger my fave) and the chicken katsu which is pretty creative.
There are a couple downsides though, they don't offer anything for your vegie/vegan/hippie friends (jk). So keep that in mind if you take your friends there. On top of that it can be a little pricey, $5 for a burger and its kind of small, but its more than worth it. Also remember to tip! - it pays off here for sure.