Pat dry short ribs with paper towels and seasoning liberally with salt & pepper on all sides
In a cast iron skillet, heat grape seed oil on medium high heat until hot
Sear ribs on all sides until brown, about 3 minutes per side
Remove ribs and turn heat to medium
Sauté onions & carrots until fragrant, about 2 minutes
Season with oregano, all spice, thyme, salt & pepper
Add tomato paste & garlic and stir until combined
Deglaze pan with red wine and allow the alcohol to cook off for about one minute
Turn off heat and transfer short ribs to instant pot
Pour braising liquid over the ribs and add bay leaves, more beef broth, tomato sauce, salt and pepper
Give everything a good stir until well combined
Cook on high pressure for 60 minutes, natural release
Once pressure is released, remove short ribs from liquid, bone should easily slide away from meat and the meat should be falling apart and very tender
Discard bones and shred meat
Separate the fat from the liquid and combine it in the instant pot with the shredded meat
To the shredded meat and liquid add parmesan cheese, butter heavy cream & Worcestershire sauce
Mix well and allow it to simmer until pasta is ready or just keep on warm
Cook pasta according to package instructions
Combine pasta & meat sauce in the instant pot
Serve hot with Parmesan cheese