It really is. Back when I was in California I'd make it once a week or so on our Weber grill that I modified to get the coals closer. One of my friends that wouldn't normally eat beef would chow on them.

It's just ground beef + onion pulp (they juice an onion and mix what's left with the meat). Not very difficult to make yourself if you have charcoal grill and flat and wide kabob skewers.