January 8, 2013 20-Hour Sous Vide Oxtail Stew on Creamy Mustard Mash Beef / Gourmet / Soups & One Pot Meals / Sous Vide Recipes 0 Courtesy of Cook Sister www.cooksister.com Serves 4 INGREDIENTS For the oxtail 4 pounds (1.8 kg) oxtail pieces 8 small to medium whole onions, unpeeled 1 full …