Miso ramen soup with buckwheat noodles

Ингредиенты

• 1.5kg beef bones, chicken carcasses, lamb bones (usually free from the butchers) or use the saved bones from a roast
• splash of apple cider vinegar or fresh lemon juice (optional – this can help to extract the minerals from the meat bones)
• 1 handful of any onions, leeks, carrots or celery ends
• 1 tbsp black pepper
• 2 bay leaves
• 350g/12oz buckwheat
• 1 tbsp sesame oil
• 4 heads pak choi
• 200g/7oz mixed mushrooms
• 1 carrot
• ½ red cabbage
• 5cm/2in piece fresh root ginger
• 6 spring onions
• 4 tbsp lime juice
• 2 tbsp miso
• 1-2 tsp tamari
• large handful chopped fresh coriander