Preheat your oven to 375°F.
Season the beef short ribs with salt and pepper. In a heavy, oven-safe pot, heat olive oil over medium-high heat and sear the short ribs on all sides until browned.
Reduce heat to low, add minced garlic and fresh thyme, and let the aromas develop for about 1 minute.
If desired, add a splash of water or low-sodium broth, cover the pot, and let the ribs braise on the stove for about 1.5 hours until tender. Alternatively, transfer the pot to the oven to braise for 2 hours.
While the ribs are braising, prepare the roasted root vegetables. Peel and cut the carrot, parsnip, and turnip into uniformly sized pieces, and slice the red onion into wedges.
Toss the vegetables with a pinch of salt, pepper, and a drizzle of olive oil on a baking sheet. Roast in the preheated oven with the ribs for about 25-30 minutes, or until tender and lightly caramelized.
Once the short ribs are tender, plate a portion (approximately 4.5 oz) with a generous serving of roasted root vegetables. Serve warm and enjoy the hearty flavors.