Mix rice and dal, wash it and soak for 30 minutes.
Heat ghee in a pressure cooker.
Add cumin seeds and mustard seeds. When they crackle add in the onions.
Saute until golden.
Add tomatoes, sambar powder, turmeric powder and salt.
Saute on low flame until the tomato is mushy.
Drain the soaked rice and dal and add it.
Saute for a minute on low flame.
Finally add water and wait until it starts boiling.
Cover the cooker and add the weight.
Wait until it whistles thrice.
Switch off flame and wait for the pressure to release.
Once the pressure in the cooker is gone, remove the lid, give a nice stir and serve immediately topped with chopped coriander leaves.