Brown the Beef: In a large pot, heat the oil over medium-high heat. Add the beef chunks and sear until browned on all sides. Remove beef and set aside.
Sauté the Aromatics: In the same pot, add the onions and garlic. Cook until the onions are translucent. Stir in the flour and cook for a minute more.
Combine and Simmer: Return the beef to the pot. Add the mushrooms, beef broth, tomato paste, and Worcestershire sauce. Bring to a boil, then reduce to a simmer. Add the herbs, cover, and let simmer for about 1.5 hours, or until the beef is tender.
Final Seasoning: Season with salt and pepper to taste. Let the stew cook uncovered for the last 30 minutes to thicken the sauce if desired.
Prep Time: 20 minutes | Cook Time: 2 hours | Servings: 4