Nana used to put this on the dinner table all the time. Nobody could guess her 'secret' ingredient

Preheat your oven to 325°F (165°C).
Season the beef chuck roast generously with salt and pepper on all sides.
In a large Dutch oven or oven-safe pot, heat the vegetable oil over medium-high heat.
Sear the roast until it’s browned on all sides, about 4-5 minutes per side. Remove the roast and set it aside.
In the same pot, add the sliced onion and cook until translucent, about 5 minutes.
Add the minced garlic and cook for another 1-2 minutes until fragrant.
Place the roast back in the pot and add the chopped carrots and celery.
Pour in the Coca Cola, beef broth, diced tomatoes, Worcestershire sauce, and tomato paste.
Add the dried thyme, rosemary, and bay leaves. Stir to combine all ingredients.