Instructions:
Preheat the oven to 325°F (165°C).
Season the short ribs generously with salt and pepper.
In a large Dutch oven or oven-safe pot, heat the olive oil over medium-high heat. Brown the short ribs on all sides, working in batches if needed. Transfer the ribs to a plate.
In the same pot, add the diced onion, carrots, celery, and garlic. Sauté for about 5 minutes until the vegetables are softened.
Pour in the red wine, scraping the browned bits from the bottom of the pot. Bring it to a simmer and let it cook for about 5 minutes to reduce slightly.
Stir in the beef broth, diced tomatoes, thyme, and rosemary.
Return the browned short ribs to the pot, nestling them into the liquid and vegetables.
Cover the pot with a lid and place it in the preheated oven. Braise the short ribs for about 3 to 3 1/2 hours, or until the meat is tender and easily falls off the bone.
Once done, carefully remove the short ribs from the pot and set them aside. Discard the bay leaves and herb sprigs.
Using an immersion blender or transferring the mixture to a regular blender (in batches), blend the cooked vegetables and sauce until smooth.
Return the blended sauce to the pot and simmer over medium heat to reduce it further if desired.
Serve the braised short ribs over mashed potatoes, polenta, or your choice of side. Spoon the sauce over the ribs and garnish with chopped fresh parsley.