This is a versatile dressing with a refreshing flavour that brings out the best in a rice salad. I am always asked for this recipe once people taste it, as rice salads can generally be very boring. The curry powder is the old fashioned one my mum has bought for years simply called Indian curry powder. It is not curry paste or masala but a milder type our grandma's used for making curried sausages and eggs. Do not use floury potatoes, they need to hold their shape when being mixed with the dressing etc. Cooking times are for the rice and potatoes and are approximate.