Preheat your oven to 325°F.
Season the beef short ribs generously with salt and pepper. In an oven-safe pot or Dutch oven, sear the short ribs over medium-high heat until all sides are browned, about 2-3 minutes per side.
Add 1-2 sprigs of thyme and the bay leaf to the pot. Optionally, you can deglaze the pot with a splash of water or low-sodium beef broth.
Cover the pot and transfer it into the oven to braise for about 2 to 2.5 hours, or until the meat is fork-tender.
While the ribs braise, preheat a separate oven tray with a drizzle of olive oil. Peel and cut the carrot, parsnip, and turnip into uniformly sized pieces.
Toss the chopped vegetables with olive oil, salt, pepper, and a pinch of thyme. Spread them evenly on the tray.
Roast the vegetables in the oven for about 25-30 minutes, stirring halfway through, until they are tender and lightly caramelized.
Once the short ribs are done, remove the bay leaf and additional thyme sprigs. Plate a portion of braised ribs alongside a serving of roasted vegetables.
Serve hot and enjoy the comforting balance of rich, juicy beef and sweet, roasted root vegetables.