01 - Toss beef cubes with flour, salt, and pepper in a large bowl until evenly coated.
02 - Place coated beef in the bottom of the slow cooker. Add carrots, potatoes, celery, onion, and garlic on top.
03 - Mix beef broth, tomato paste, and Worcestershire sauce in a separate bowl until combined.
04 - Pour the liquid mixture over the beef and vegetables. Add thyme, rosemary, and bay leaves.
05 - Cover and cook on LOW for 8 hours or HIGH for 4 hours, until beef is very tender and vegetables are cooked through.
06 - Remove bay leaves. Stir in frozen peas and cook for an additional 10 minutes. Taste and adjust seasoning if needed. Serve hot.