Sous-Vide Osso Buco

Name: Sous-Vide Osso Buco
Prep time: 30 min
Cook time: 12 h 40 min
Total time: 13 h 10 min
Cuisine: European, Mediterranean
Ingredients: 4 pieces veal shank, bone in (approx. 6-7 oz ea., 4 in. x 6 in.); 2 pinches salt; 2 pinches ground black pepper; 1 tbsp all-purpose flour, to dust; 3 tbsp vegetable oil, to fry; 1 garlic clove; 2 oz yellow onion, cut in pieces; 1 oz extra virgin olive oil; 7 oz leeks, white part only, in slices (1 in.); 1 pinch ground sweet paprika; 2 oz tomato paste; 7 oz red wine; water to fully submerge bags (not higher than max. fill mark); 1 oz lemon juice, freshly squeezed (approx. ½ lemon) (see Tip) or 1 tsp ascorbic acid (vitamin C powder); fresh parsley leaves, chopped, to garnish