Mix together the beetroot, yoghurt, salt and pepper in a bowl. Cover and refrigerate for one hour, or until ready to serve.
When ready to serve, heat the oil in a small pan and add the mustard seeds. When they pop, add the sesame seeds and curry leaves and keep on the heat until the sesame seeds start to colour.
to serve
Pour this tempered oil over the beetroot and yoghurt, stir once and serve.