Preheat the oven to 170°C / 150°C fan forced
Season the flour with salt and use to coat the beef chunks. Fry the beef in a little oil over a high heat until browned all over (but not cooked through), remove from the pan and set aside.
In a cast iron or casserole dish, fry the bacon lardons until crisp, remove from the pan and set aside with the beef.
Fry the onions in the bacon fat until soft, then add the garlic, ginger, chilli flakes and 5-spice. Be careful not to burn the spices.
Return the beef and bacon lardons to the pot with the onions and spices, along with the red wine, beef stock, black vinegar, soy sauce, brown sugar and rosemary. Bring to the boil, then remove from the heat, cover and place in the oven to cook for 45 minutes.
While the beef is cooking, fry the chestnut mushrooms and shallots in a little oil and salt until lightly browned. Remove from the heat and set to one side.
After the first 45 minutes, remove the beef from the oven, gently stir in the mushrooms and shallots and return to the oven for a further 45 minutes.
Divide into bowls and garnish with a little parsley. Optional: Serve with Wasabi Mash Potato and Sesame-Lime Carrot Salad.