Sear the Meat – Season short ribs with salt and pepper. Sear in oil on all sides until well browned. Remove and set aside.
Sauté Aromatics – In the same pot, cook garlic, ginger, and scallions for 2–3 minutes until fragrant.
Deglaze – Add sake and scrape up the browned bits from the bottom.
Build the Sauce – Stir in miso, tamari, honey, and rice vinegar. Mix well.
Braise – Return the short ribs to the pot. Pour in enough beef stock (2–4 cups) to just cover the meat. Cover and braise in a 325°F oven for about 3 hours, until fork-tender.
Finish – Optional: Remove meat and reduce the sauce on the stove. Add cornstarch slurry to thicken, if desired. Return meat and coat with sauce.
Serve – Over mashed potatoes, rice, or noodles. Garnish with extra scallions or sesame seeds if you like.