Using a good-quality curry powder or paste takes all the work out of making this fabulous dish. For the best flavour, make it a day ahead and reheat.
*Add a finely diced eating apple and a handful of raisins to the curry 15 minutes before the end of cooking. You can substitute cream for the yoghurt. *Serve with boiled rice or warm naan bread. Make a banana raita accompaniment, with sliced bananas tossed in Greek-style yoghurt.