- Preheat the oven to 150°C. Place a large casserole pan on the hob, add 1 tbsp of the oil and heat until very hot.  
- Season the pork with the salt and pepper and place in the pan with the hot oil. Sear on all sides. 
- Mix the vegetable stock with the miso paste and pour over the pork. 
- Add in the onion, the whole carrot, garlic and ginger.  
- Now add the mirin, soy sauce and the red chilli. Bring to the boil, then place a lid on the pan and place in the oven for 4 hours.  
- Remove and discard the layer of fat. Take the pork out and shred the pork using two forks. 
- Place a sieve over a large bowl and strain the cooking liquid. Throw away the strained vegetables and place the liquid back in the pan with the shredded pork. 
- Boil the eggs for 6 minutes, then immediately place the eggs in iced water to stop the cooking. 
- Place the noodles in a pan of boiling water and boil for 5 minutes. Then drain, run under cold water and put to one side. 
- Add the leek and spring onions to a frying pan with a little oil, season with a pinch of salt and pepper then fry for 5 minutes. Add the bok choi to the pan to wilt. 
- Divide the noodles between four bowls. Top with the hot broth and shredded pork. 
- Carefully peel the boiled egg, slice in half and place on top with the fried leeks, spring onions and bok choi.