Preheat your oven to 325°F.
Evenly season the beef chuck roast with kosher salt, coarse black pepper, and garlic powder on all sides.
In a large braising pan or Dutch oven, heat the olive oil over medium-high heat. Once hot, add the seasoned roast, searing it for about 4 to 5 minutes per side.
After browning the roast, turn off the heat. Add the yellow onion and carrots around the sides of the meat.
Drizzle the mixture with remaining olive oil, pour in beef broth and add Worcestershire sauce. Nestle the thyme sprigs around the roast.
Cover the pot with a lid and bake in the preheated oven for approximately 3 hours.
Once finished, remove the roast, carrots, and onions and let the meat rest on a cutting board for about 10 minutes.
Prepare the optional blue cheese gravy by whisking together garlic, blue cheese, and heavy cream while cooking over medium heat until thickened.
Slice the roast and serve with caramelized vegetables, spooning the creamy gravy over the top if desired.