Spicy Brinjal and Potato Stir Fry

Brinjal is one of my favourite vegetables. Growing up in the hillstation Valparai we had our own patch of vegetable garden and we used have plump brinjal / eggplants that tasted totally out of the world ( i would say) in a simple sambar or in a stir fry or a bhajji. This is my mother's recipe...trying to use the brinjal in different ways and so a spicy one with lots of pepper.