01 - Sprinkle beef short ribs evenly with salt and black pepper, ensuring thorough seasoning on all sides.
02 - Heat a large skillet over medium-high heat. Sear the short ribs for 2 to 3 minutes per side until well browned. Transfer browned ribs to the slow cooker.
03 - Add chopped onion, sliced carrots, celery, and minced garlic to the skillet. Sauté for 3 to 4 minutes, stirring occasionally, until vegetables are slightly softened. Transfer sautéed vegetables to the slow cooker.
04 - Pour beef broth and dry red wine into the slow cooker. Stir in tomato paste and Worcestershire sauce to combine.
05 - Nestle fresh thyme sprigs, rosemary sprigs, and bay leaves among the ribs in the slow cooker.
06 - Secure the lid and cook on LOW for 8 hours, or until the ribs are exceptionally tender and the meat separates easily from the bone.
07 - Remove herb sprigs and bay leaves. Skim and discard excess fat from the surface if needed.
08 - For a thicker sauce, stir in the cornstarch-water mixture. Switch the slow cooker to HIGH and cook for an additional 10 to 15 minutes, or until the sauce thickens.
09 - Present beef short ribs hot, accompanied by the sauce and cooked vegetables.