Wash the brinjal and trim the edges and cut the brinjal ½ inch length wise.
In a pan heat 2 tbsps of oil and add the mustard seeds. Let the mustard pop.
Add the chana dal and curry leaves. Saute for 30 seconds.
Add the asafoetida and few curry leaves and saute for few seconds.
Add the cubed brinjal, turmeric powder and quarter tea spoon of salt. Mix well and close the lid.
Cook till the brinjal is soft, stirring often.
After the brinjal is cooked, add the tomato pieces and saute for 2-3 minutes.
Add a teaspoon of vangi bath powder and little salt. Mix and cook for another five minutes.
Now remove the brinjal mixture from the skillet and put it in a plate.
Now in the same skillet add the cooked rice , a tablespoon of oil, 1 tsp of vangi bath powder, necessary salt and lemon juice. Gently mix all the ingredients, with out breaking the rice.
Once the spices are well incorporated in the rice, add the brinjal mixture to the rice and mix it well. Taste and re season accordingly.