In a large pot of water,add the pigs feet. Soaked in the water for about two hours, changed the water after an hour. Bring to a boil and boil them for 30 minutes. Discard the water, wash the pot and the bones. Put the pieces back in the pot with 1 one inch piece of ginger and five cloves of garlic. Put them to a slow boil for twenty hours. About every hour skim off any foam and fat. After the 20 hours, remove the bones and strain the liquid. Chill in the refrigerator until required.
In a pan with the salted boiling water, add the bean sprouts and boil for a minute. Strain and run under cold water, drain well.
In a small bowl, addd miso, soy sauce and spicy red chilli pepper; mix well.
In a pan with boiling water, cook the noodles for about 2-3 min, strain and run under cold water; remove on a deep dish. Top the noodles with the bean sprouts , place the pork pieces, green onion, prepared sauce and pour over the pork broth.