Preheat your oven to 275F
Season your short ribs with salt and pepper on both sides
Roughly chop your celery, onions, and carrots and set aside
Add oil to your dutch oven and make sure to heat for 3-4 minutes on high heat. You want to make sure the oil gets very hot so you get that nice sear.
Lower the heat to medium high and add in your short rib in batches, making sure not to overcrowd the pan.
Sear for about 5 minutes or until a golden crust forms. Flip over and make sure to sear on all sides.
Remove your short ribs and set aside. Turn your heat to medium and add in your garlic, onions, carrots, and celery. Saute for about 5 minutes.
Add in your tomato paste and cook for 5 minutes or until the tomato paste has caramelized a little.
Add in your red wine (or wine substitute) and deglaze your pan. Make sure to scrape all that delicious fond on the bottom of your pan.
Add in your beef broth and fresh or dried thyme.
Add your short ribs back in along with your bay leaves and cover. Bake at 275F for 3.5 hours.
You'll know it's ready when it's tender to the fork.