01 - Season the beef cubes with salt and pepper, then toss with the flour until thoroughly coated.
02 - In a large skillet over medium-high heat, warm the olive oil. Brown the seasoned beef in batches until all sides are seared. Transfer the seared beef to the slow cooker.
03 - Incorporate the carrots, potatoes, celery, onion, and garlic into the slow cooker with the beef.
04 - In a separate bowl, whisk together the beef broth, red wine (if utilizing), tomato paste, and Worcestershire sauce. Pour this liquid mixture over the beef and vegetables in the slow cooker.
05 - Introduce the bay leaves, thyme, and rosemary to the slow cooker. Stir gently to ensure all ingredients are well combined.
06 - Cover the slow cooker and cook on the low setting for 8 hours, or until the beef is fork-tender and the vegetables are soft.
07 - During the final 30 minutes of cooking, add the frozen peas. Taste and adjust seasoning with additional salt and pepper as needed.
08 - Before serving, carefully remove and discard the bay leaves. Serve the stew hot, optionally garnished with fresh parsley.