3. Sear the Ribs
Carefully remove the ribs from the bag, reserving the marinade and garlic in the bag. Place the ribs on a paper towel-lined plate and pat dry.
Heat the remaining 2 tablespoons of oil in a Dutch oven over medium-high heat. When the oil is shimmering, add half of the short ribs and cook until well browned, 2 to 3 minutes per side. Return to the plate and repeat with the remaining ribs. Add the stock, bring to a simmer, and scrape up any browned bits. Return the ribs to the pot along with the reserved marinade.