Instant Pot Osso Buco with Risotto Milanese

• 1 kg (2lb) beef shin
• 2 tbsp olive oil
• 1 onion finely chopped
• 2 medium carrots peeled and finely chopped
• 3 celery ribs finely chopped
• 4 garlic cloves
• 6 sprigs fresh thyme
• 1 cup red wine
• 400 g (14oz) chopped tomatoes
• 2 cups beef stock
• 2 tsp salt
• 1 tsp pepper
• 1 tsp sugar optional

For the Risotto Milanese

• 1 small onion finely chopped
• 2 garlic cloves minced
• 2 cups arborio rice
• 4 cups chicken stock
• pinch of saffron
• 2 tsp salt
• 1 tsp pepper
• 3 tbsp butter
• 1 cup grated Parmesan cheese

For the Gremolata

• ½ cup chopped parsley
• zest of 2 lemons
• 2 garlic cloves finely chopped