I love this dish. It is a very simple and delicious dish I use to eat this a lot while in Bangalore.
* Cooked rice a bowl full
* Yoghurt 1 cup
* Mustard seeds 1/2 tsp
* Whole red chillies 2-3
* Curry leaves 10-12
Mix yoghurt and rice in a bowl, add couple of spoons of milk if needed.
Heat a tbsp of oil and splutter mustard, curry leaves and red chillies.
Add the tarka to the rice and yoghurt mix.
Add salt as per taste.