Instructions:
- Pat the beef cubes completely dry. Toss them in a bowl with salt, pepper, and the first measure of flour until lightly coated.
- Heat oil in a large Dutch oven over medium-high heat. Working in batches, sear the beef until deeply browned on all sides. Remove seared beef with a slotted spoon and set aside.
- Reduce heat to medium. Add butter to the pot. Sauté onions, carrots, and celery until softened (about 6-8 minutes). Add minced garlic and cook for 1 minute until fragrant.
- Sprinkle the second measure of flour over the vegetables. Stir constantly for 2 minutes to cook out the raw flour taste.
- If using wine, pour it in, scraping up all the browned bits (the fond) from the bottom of the pot. Let it bubble and reduce by half.
- Return the beef to the pot. Pour in the beef broth until the meat is fully submerged. Stir in Worcestershire sauce, thyme, and the bay leaf.
- Bring to a gentle simmer. Cover the Dutch oven tightly. Reduce heat to low and simmer gently for 1 hour 45 minutes, or until the beef is fork-tender. Stir occasionally.
- Add the quartered potatoes to the stew. Continue simmering, covered, for another 30-40 minutes, or until the potatoes are easily pierced with a fork. Remove the bay leaf.
- Stir in the frozen peas during the last 5 minutes of cooking. Taste the gravy and adjust seasoning with salt and pepper as needed.
- Ladle hot stew into bowls and garnish generously with fresh parsley before serving.