Cut the pork into large chuck about 3 inches. Trim excess fat.
To a dutch oven, add olive oil and sear the pork on all sides. Remove from the pan and set aside.
To the same pot, add carrot, celery and onion. Saute until softened. Add tomato paste and cook for a few mins.
Deglaze the pot with wine, making sure to scrape up all the brown bits on the bottom of the pot. Cook the wine out until you do not smell alcohol anymore, about 3 mins.
Add whole San Marzano tomatoes and crush with a wooden spoon or meat masher tool. Season sauce with salt and pepper.
Add the pork back in with the juices that have collected on the plate. Add enough stock to cover the meat. Place the cover on and place into the oven at 325℉ for 3 hours.
****If using a crock pot, pour the sauce and meat into the crockpot and set on high for 6-8 hours.****
Once the meat is fork tender, remove it to a plate and using 2 forks to shred it. Add the meat back to the pot and cook on low medium for another 15 mins to allow the meat to absorb the flavors of the sauce.
Boil your pasta of choice (I am using Pennoni), add the pasta to the pot with the sauce and mix well.
Top with lots of grated Parmigiano Reggiano and Buona Domenica!