01 - Place the beef, carrots, potatoes, celery, onion, and garlic into the slow cooker.
02 - Pour in the beef broth, diced tomatoes with their juices, tomato paste, and Worcestershire sauce. Stir well to combine.
03 - Sprinkle the thyme, rosemary, bay leaves, salt, and pepper over the mixture. Mix gently.
04 - Cover and cook on low setting for 8 hours or on high for 4–5 hours until the beef is tender and vegetables are cooked through.
05 - In a small bowl, whisk together the cornstarch and cold water until completely smooth.
06 - Stir the cornstarch mixture into the stew. Cover and cook on high for an additional 15–20 minutes until slightly thickened.
07 - Remove and discard the bay leaves before serving.