- In a large pot, heat olive oil over medium heat.
- Add the beef and brown on all sides.
- Remove the beef and set aside. In the same pot, add onion, carrots, celery, and garlic; sauté until softened.
- Return the beef to the pot and stir in the beef broth, Guinness, tomato paste, thyme, bay leaf, salt, and pepper.
- Bring to a boil, then reduce heat and simmer for 1.5 to 2 hours, or until the beef is tender.
- If desired, mix cornstarch with a little water and stir into the stew to thicken.
- Remove the bay leaf before serving.
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