Heat oil in a large pan. Add mustard seeds. When it starts to pop, add urad dhal, channa dhal & peanuts. Fry for few minutes until they get roasted. Then add onions & chilies and fry until the onions are soft. Add turmeric powder & salt and fry until the smell of turmeric vanishes. Turn off the heat and add cooked rice & cashew nuts and pour the lime juice & mix well until the rice is evenly coated.