Heat the oil in a large pan. Brown the meat in two lots, remove from the pan, then brown the onions, add back the meat with all the other ingredients and simmer for 30-40 minutes. Taste for seasoning.
Heat a large pan and stirfry the noodles in hot oil, add in the scallions, soy and sesame oil. Spoon the noodles into large deep serving bowls, then spoon on the meat sauce and garnish with a mixture of the coriander, chilli and peanuts.