Preheat oven to 150C. Place pork in a 3-litre baking dish, drizzle with olive oil, season to taste and roast until very tender (3 hours). Remove pork skin (discard) and set pork aside.
For pistachio crust, increase oven to 190C. Combine ingredients in a bowl with enough juices (at least 1 tbsp) from the base of the baking dish to allow the crust to stay together, then press onto pork belly. Add peach halves to baking dish, then return to oven and roast until crust is golden and crisp and peaches are tender (15-20 minutes).
Serve pork belly and roasted peaches drizzled with juices from the baking dish, along with a simply dressed frisée salad.
This recipe is from the February 2012 issue of Australian Gourmet Traveller.