1. Heat the olive oil in a large skillet over medium heat.
2. Add the beef chuck roast and brown on all sides, about 5 minutes per side.
3. Transfer the beef to a slow cooker.
4. Add the onion, garlic, thyme, rosemary, black pepper, sea salt, tomato paste, beef broth, Worcestershire sauce, and bay leaves.
5. Cover and cook on low for 8-10 hours.
6. Add the carrots and potatoes, cover, and cook for an additional 2-3 hours.
7. Remove the bay leaves, serve, and enjoy!