1 Heat a little of the oil on a high in a deep-sided pan. fry onion for 1-2 mins then remove. 2 heat a little more oil on igh. Brown lamb in small batches, remove each batch before adding the next. 3 Reduce heat and return lamb and onion. Add sauce and tomatoes (including juice). Cover and simmer for 11/2 - 2 hours or until tender. 4 Add coriander and yoghurt just before serving.