01 - Place beef stew meat in the bottom of the slow cooker.
02 - Arrange carrots, celery, potatoes, onion, and garlic over the beef.
03 - Pour in beef broth, diced tomatoes with juice, tomato paste, and Worcestershire sauce. Sprinkle with salt, pepper, thyme, rosemary, and add bay leaves.
04 - Stir gently to combine. Cover and cook on LOW for 8 hours, or HIGH for 4–5 hours, until beef and vegetables are tender.
05 - About 20 minutes before serving, stir in frozen peas.
06 - For thicker consistency, stir in cornstarch slurry, cover, and cook on HIGH for 15–20 minutes until thickened.
07 - Remove bay leaves, adjust seasoning, and serve hot.