01 - Set the oven temperature to 320°F.
02 - Coat beef shin chunks with flour, shaking off excess.
03 - Heat vegetable oil in a large ovenproof casserole over medium-high heat. Brown the beef in batches, then remove and set aside.
04 - Add sliced onions, carrots, and celery to the casserole. Cook for 5 minutes until softened.
05 - Stir in garlic and cook for 1 minute. Mix in tomato paste and cook another 2 minutes.
06 - Return beef to the casserole. Pour in beef stock and red wine. Add bay leaves, thyme, salt, and pepper. Stir and bring to a gentle simmer.
07 - Cover the casserole with a lid and transfer to the oven. Cook for 2 hours.
08 - Rub butter into flour in a bowl until mixture resembles breadcrumbs. Add parsley, chives, salt, and gradually add water to form a soft dough.
09 - Divide the dough into 8 equal portions and shape into balls.
10 - Remove casserole from oven after 2 hours. Arrange dumplings evenly on top of the stew.
11 - Cover and return casserole to oven for 30 minutes until dumplings are puffed and fully cooked.
12 - Discard bay leaves and thyme sprigs before serving. Serve hot and garnish with extra herbs if desired.