Place a large, heavy-bottomed frying pan over a medium heat for 5 mins. Crush the Star Anise & bag it up in a square of muslin.
Add this to the pan, along with 25 ml oil & the sliced onions.
Cook for 20 mins, or until the onions are soft & caramelized, stirring occasionally.
Set aside.
At the same time preheat another large, heavy-bottomed frying pan over a a low heat for 5 minutes.
Mince the garlic.
Pour 50 ml of oil into the pan, then tip in the garlic, onions, carrots & celery & cook this soffritto over a medium-low heat for about 20 min, or until the raw onion smell has gone.
Transfer the soffritto to a bowl and wipe clean the pan.
Place the pan over a high heat for 10 mins. Pour 50 ml olive oil & wait until it starts smoking: it must be hot enough so the meat browns rather than stews.
Add the cubed pork and the minced oxtail.
Do this in multiple batches to ensure the meat is getting properly browned. Deglaze the pan with a slug of white wine between batches reducing it a little. Transfer the meat into a larger pot.
Remove the Star Anise from the caramelized onions, then tip them into the pot containing the meat.
Add the remaining wine to the onion pan to deglaze it. Reduce the wine by half & pour it into the pot with the meat.
Add the soffritto.
With the meat pot over a very low heat, pour in the milk and enough water to cover the mix and simmer very gently without a lid for 6hrs, stirring occasionally. Make sure the mix stays covered with liquid, adding water as necessary. The milk will go chunky but it doesn’t effect the final product.