My favourite vegan pizza in Auckland is at Il Buco on Ponsonby Road.
Il Buco sells pizza by the rectangular slice, and vegan slices are labelled with a V. They’re cheeseless, but involve plenty of good-quality oil so aren’t at all dry. The two slices I had the other day were:
1. Ortolana: tomato, potato, courgette, onion, capsicum, oregano.
2. Patate: thinly sliced potato with rosemary
As well as the pizza slices, the coffee is pretty good.
Il Buco is at 113 Ponsonby Road, and is open Monday to Saturday. Edited to add: From early 2013 or so, Il Buco has been open seven days a week. Check their website for details.