01 - Preheat oven to 325°F.
02 - Pat short ribs dry with paper towels and season generously on all sides with salt and black pepper.
03 - Heat olive oil in a large Dutch oven over medium-high heat. Sear short ribs in batches until deeply browned, about 3–4 minutes per side. Transfer browned ribs to a plate.
04 - Reduce heat to medium. Add chopped onions, carrots, and sliced celery; sauté for 5–6 minutes until softened, scraping up any browned bits.
05 - Add minced garlic and tomato paste to the vegetables; cook for 1 minute, stirring until fragrant.
06 - Pour in apple cider and beef broth, stirring to combine and deglaze the pot.
07 - Nestle short ribs into the vegetable mixture in the pot. Add thyme, rosemary, and bay leaves.
08 - Bring liquid to a gentle simmer. Cover pot tightly with a lid and transfer to the preheated oven. Braise for 2½ to 3 hours, until ribs are fork-tender and meat easily pulls from the bone.
09 - Remove ribs and vegetables to a serving platter. Discard herb sprigs and bay leaves. Skim accumulated fat from the surface of the cooking liquid. Spoon sauce over ribs to serve.