01 - Pat beef cubes dry with paper towels and season with salt and black pepper.
02 - Heat olive oil in a large skillet over medium-high heat. Sear beef in batches until browned on all sides, then transfer to slow cooker.
03 - Place carrots, potatoes, celery, onion, and garlic into the slow cooker with the beef.
04 - Whisk flour with ½ cup beef broth in a small bowl until smooth, then add to slow cooker.
05 - Add remaining beef broth, red wine, tomato paste, Worcestershire sauce, dried thyme, dried rosemary, and bay leaves. Stir to combine evenly.
06 - Cover and cook on low for 8 hours or on high for 4 to 5 hours until beef is tender and vegetables are cooked through.
07 - Remove bay leaves, stir in frozen peas, and cook for an additional 10 minutes.
08 - Taste and adjust seasoning with salt and black pepper as needed. Serve hot.