Step 1:
Set your sous vide to: 75°C/167°F
Brown the beef shin quickly in hot oil in a large wide bottom pan & remove. (you want it to be brown on the outside & still pink in the middle)
Step 2:
‘Deglaze’ the pan with a splash of the veg stock then add the onion, celery, garlic & carrots. Gently fry & ‘sweat’ until very soft (about 20 mins). Add the wine, stocks & tinned tomatoes. Bring to the boil and cook for 20 mins