01 - Generously season beef short ribs with salt and black pepper on all sides.
02 - Heat a large skillet over medium-high flame and brown short ribs on each side for 2 to 3 minutes until golden. Transfer to slow cooker.
03 - In the same skillet, add onion, carrots, celery, and garlic. Cook for 3 to 4 minutes until slightly softened. Transfer mixture to slow cooker.
04 - Pour in beef broth and red wine. Stir in tomato paste and Worcestershire sauce until thoroughly combined.
05 - Nestle thyme, rosemary, and bay leaves into the slow cooker.
06 - Cover and cook on LOW setting for 8 hours, or until ribs are exceptionally tender and meat releases from the bone.
07 - Discard thyme, rosemary sprigs, and bay leaves. Skim off excess surface fat if needed.
08 - For a thicker sauce, stir cornstarch slurry into the slow cooker and cook on HIGH for an additional 10–15 minutes until the sauce has thickened.
09 - Present beef short ribs hot, accompanied by their sauce and vegetables.