Add remaining 1 tablespoon of olive oil to pot and add onion and garlic, cooking until soft and translucent, about 3-5 minutes. Add carrot, celery, and potatoes, and cook for another 5 minutes. Add back the steak and bacon, and add mushrooms, herbs, diced tomatoes, tomato paste, Worcestershire sauce, beer and broth. Increase heat until bubbling, then reduce heat to low. Simmer gently for 1.5–2.5 hours or until meat is tender, vegetables are cooked, and sauce is thickened. Add salt & pepper if necessary, to taste. Remove from heat.