For gravy. grind onion, tomato and make a paste. In the same kadai. Add liitle oil. Add cumin seeds. Let it crackle for few minutes. Add chopped onion fry till it become light brown in colour. Then add all the masala, turmeric powder, red chilly powder, cumin powder, garam masala and salt. Saute it till the raw smell of masala goes off. Add little water as needed. Then add eggs. Cook till the gravy is thick and dry. Once it is done.