Wash the rice, drain the water and keep it aside for ten minutes.
Take a pan, add oil and ghee mixture to it. Put in the spices and let them sizzle. Now, slit the green chilly and put them in. After a second, put the onions and saute them until translucent. Now, add the rice and saute for two minutes.
Put the required quantity of water and salt to it. Give a stir. Close the lid and put the whistle. Allow it to cook until one whistle.
Let the pressure release by itself.
In a small pan, heat a teaspoon of ghee, add cumin and cashew pieces to it. Saute them and put it over the prepared rice. Gently mix it and serve along with any dish of your choice.
Notes
Only ghee may be used, but I prefer to use a mixture of both. It is more tastier.
Adding of onions is optional.
I do not soak the rice in water. I wash it well, drain the water and keep it aside for ten minutes. This method works well for me.