Pat the beef dry with paper towels and season evenly with sea salt and black pepper.
Heat the olive oil in a heavy-bottomed pot or Dutch oven over medium-high heat.
Sear the beef cubes until deeply browned on all sides, then remove from the pot and set aside.
Add the diced onion, carrots, and celery to the same pot, sautéing for 5 minutes until the vegetables begin to soften.
Stir in the minced garlic and tomato paste, cooking for 1 minute until the mixture is fragrant.
Pour in the red wine to deglaze the pan, using a wooden spoon to scrape up all the browned bits from the bottom.
Return the beef to the pot and add the beef bone broth and fresh thyme sprig.
Bring to a gentle simmer, then cover with a tight-fitting lid and reduce heat to low.
Cook for 90 to 120 minutes, or until the beef is fork-tender and the sauce has thickened.