Preheat your oven to 160 fan (320 fahrenheit)
Season the pork with salt and pepper and heat 1 tbsp olive oil in a pan over medium - high heat (or I do it in two pans at once to save time). Brown the chunks on all sides and set aside. Keep any fat that has rendered to pour into the onion mixture.
Heat 1 tbsp oil in a heavy bottomed oven proof saucepan and fry the pancetta for 10 mins until browned, lift out onto a plate with a slotted spoon, leaving the fat behind.
Add the onion, carrot, celery, fennel seeds and a good pinch of salt and pepper and cook over medium heat until soft, around 10 minutes. Lower heat if it starts to brown and add more oil if it dries out. After 5 minutes add the garlic and continue cooking.
Add the pork and pancetta to the pan and mix.
Add the wine and simmer to reduce the wine by at least half - 5 - 7 mins.
Add the stock, milk, and another good pinch of salt and pepper and bring to a simmer.
Tie the rosemary, thyme and sage together with kitchen twine to make a small herb bundle and put it on the top of the liquid. (if you don't have kitchen twine or string just place the sprigs loose on top).
Cover and cook in the oven for two hours. The pork pieces should pull apart easily, if not then cook for another 30 mins and check again.
A big note here is that the sauce may look broken and split, this is just the nature of this kind of ragu! I promise once you pull the meat apart and mix it all together it will be fine.
Remove the pork and shred pieces with two forks and then return to pan and give it a good mix. If there are some large pieces of fat that haven't rendered feel free to discard them.
Season with salt and pepper to taste and add a big squeeze of lemon juice.
If there is too much liquid, reduce on the stove top at a gentle simmer uncovered.
Add the ¼ cup of cream if using (highly recommend as it helps bring the sauce together).
If eating straight away, cook your pasta in a pot of boiling salted water then mix with the ragu.
Serve between heated plates or bowls and top with lemon zest and parmesan. ENJOY!
If making ahead it will solidify in fridge, gently re-heat on the stove top and you can add some pasta water or extra cream if needed.