Clean the excess of fat of the short rib, cut in 300 gr/ 10 ⅔ oz portions, add salt and pepper. Seal the short ribs pieces in a pan with the vegetable oil.
Pack the pieces in a vacuum bags and cook for 50 hours at 68°C/154°F degrees in sous vide. When the time is completed, take out from the water and put in cold water. Keep in fridge.
Nitsuke Sauce:
In a big pot add all the ingredients and cook at medium heat, mix constantly until reduced to 4 liters/ 4 quarts of sauce.
Strain and reserve.
Plating
Take the short rib from the vacuum bag, clean the fat excess.
In a pan add the nitsuke and heat on a low flame, add the vegetable stock and the short rib. Heat the short rib in the sauce until this get naped and totally covered with the sauce.
Serve the short rib on a wooden plate, add some crispy garlic and serve with the sautéed rice on the side and the benishoga over this.