01 - Place beef stew meat in the bottom of the slow cooker.
02 - Layer carrots, celery, potatoes, onion, and garlic over the meat.
03 - Add beef broth, diced tomatoes with juice, tomato paste, Worcestershire sauce, salt, pepper, thyme, rosemary, and bay leaves.
04 - Stir gently to combine ingredients. 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 a thicker consistency, stir in cornstarch slurry, cover, and cook on HIGH for 15–20 minutes until thickened.
07 - Remove bay leaves, adjust seasoning to taste, and serve hot.