Had to look it up
Yeah, I had this in France once and they always have them in the supermarchés out there. When I had it, it had been salted or cured, then boiled, and roasted lightly in the oven. The fat had almost completely rendered out, the skin was almost like crackling and the meat inside was so moist and unctuous.
At a guess, I'd put it in a bowl overnight (or up to two days) covered with a rub of two parts salt and one part dark brown sugar. It'll draw liquid out the meat; tip it away and rinse off the salt/sugar. As it's now 'cured', it'll keep in the fridge for a few weeks so you won't need to cook it immediately.
For cooking, I'd simmer it in water with maybe 10 peppercorns and 2 cloves for 2-3 hours, then finish it in the oven not too hot. Paint the outside with a little honey, season with a little salt and roast it for 20-30 minutes or until the honey goes golden brown.
You could probably slow roast it like pork belly as well.
Edit: so it might already be cured. Might just need slow roasting then. Got a pic?