The New Zealand Kumra
While visiting in NZ we were treated with many roast lamb dinners with roasted kumras(SP?) Is it the same as the white sweet potatoes we see occasionally? They were fantastic, or maybe it was because someone else was cooking? Are there any steady supplies here in the States?
sweet potatoes work just as well. Slight difference, but not that much. We've done a hangi before with sweet potatoes and it turned out just fine. Taro, on the other hand, isn't as substitutable, but can still be found here in asian markets (or really good supermarkets). however, taro is more of a samoan/tongan dish, but with the huge influences of those islands in NZ, it's nearly as common there too.
now, getting puha is a little harder to find. I always have to substitute watercress for my "pork bones and puha"...