01 - Preheat oven to 325°F.
02 - Pat beef short ribs dry with paper towels and season evenly with salt and pepper.
03 - Heat olive oil in a large Dutch oven over medium-high heat. Sear the short ribs in batches until deeply browned on all sides, approximately 8 minutes total. Transfer browned ribs to a plate.
04 - Add onions, carrots, and celery to the pot. Cook, stirring occasionally, until vegetables are softened and developing color, about 6 minutes. Add garlic and cook for an additional minute.
05 - Stir in tomato paste and cook, stirring frequently, for 2 minutes.
06 - Pour in apple cider and beef broth, scraping up any browned bits from the bottom of the pot.
07 - Nestle the browned short ribs among the vegetables. Add fresh thyme, rosemary, and bay leaves.
08 - Bring contents to a simmer, cover with a lid, and transfer the Dutch oven to the preheated oven.
09 - Braise for 2½ to 3 hours, or until the beef is fork-tender and nearly falling off the bone.
10 - Transfer ribs and vegetables to a serving platter. Skim excess fat from the braising liquid, discard herb stems and bay leaves, and reduce the sauce on the stovetop if desired. Serve ribs topped with braising sauce.