Preheat the oven to 325°F.
Season the 6 oz short ribs generously with salt and black pepper.
Heat a heavy, oven-safe pot over medium-high heat and sear the short ribs on all sides until browned, about 2-3 minutes per side. Remove and set aside.
In the same pot, add diced half onion, minced garlic, chopped carrot, and parsnip. Sauté until vegetables start to soften, about 4-5 minutes.
Deglaze the pot with 1/4 cup red wine, scraping up any browned bits from the bottom.
Return the short ribs to the pot and add 1/2 cup beef broth along with the rosemary and thyme sprigs.
Bring the liquid to a simmer, then cover the pot and transfer to the oven.
Braise in the oven for about 2 to 2.5 hours, until the meat is tender and easily pulls apart.
Remove the pot from the oven, adjust seasoning if necessary, and serve the short ribs with the root vegetables, spooning the braising liquid over the top.