Ossobuco Alla Milanese

Ingredients

• 6 pieces of veal shank, about 1 inch thick
• Sea salt and freshly ground black pepper
• 1/2 cup plain flour, sifted
• 2 tablespoons olive oil
• 8 tablespoons butter
• 1 small red onion, peeled and finely chopped
• 2 garlic cloves, peeled and chopped
• 1 celery heart, finely chopped
• 1/2 bottle of white wine
• 4 sprigs of thyme
• 1 (14 ounce) can of plum tomatoes, drained of juice, coarsely chopped
• 2 bay leaves
• Gremolata
• 2 lemons, zest finely grated
• 1 garlic clove, peeled and very finely chopped
• 3 tablespoons chopped fresh flat-leave parsley