Here is the unintended potato patch I yapped about below.
This is the south part of the house and it is just a tiny stretch of soil. Towards the front of it are the raised beds and that's where our veggies and some berries go. Against the house are a dwarf mango, citrus, Barbados cherries...and many other yummy things.
This unglamorous part toward the back is where a large compost pile resides (it is to the right of the pic). Every day I snoop around it and inside of it a bit. Love it. Towards the very very back is where we'll build two more compost piles.
Since my experience with the potatoes growing so well in and around the current compost pile at the front I decided to experiment with it this year. It will remain as it is with all the sarpo mira and purple Peruvian potatoes (pics below) growing in it. When done harvesting those I'll really start the experiment: I am going to put about a foot or so of soil, perhaps some material to hold it all in place and then I'll plant some veggies and herbs and see what happens.
PS: it just occurred to me that this is quite like what Heiko is doing in his garden in a sense...check it out here.