osso buco recipe

**Ingredients:** - 4 veal shanks, about 1 1/2 inches thick - Salt and pepper to taste - 1/2 cup all-purpose flour (for dredging) - 3 tablespoons olive oil - 1 onion, finely chopped - 1 carrot, finely chopped - 1 celery stalk, finely chopped - 3 cloves garlic, minced - 1 cup dry white wine - 1 can (14.5 oz) diced tomatoes - 1 cup beef broth - 1 tablespoon tomato paste - 1 teaspoon dried thyme - 1 teaspoon dried rosemary - 1 bay leaf - 1 tablespoon lemon zest - 1/4 cup fresh parsley, chopped (for garnish)