Gor Jackie, and any curious gastronomes,
http://www.jgeorge.com/nzfoods.html#hangi

And yes, Jackie, whanau does mean family, but in the sense of extended family - heavy stress on the "extended"! Here in NZ a trend is developing to use the English word for the Anglo-Saxon nuclear version, and whanau for the Polynesian version. Interestingly, the word in Cook Island Maori is "anau", but apparently most Cook Islanders here have adopted the NZ Maori version, and say whanau instead.