In a same kadhai, heat 3 tbsp oil, add cumin seeds and fenugeek seeds in to it. Once cumin and fenugreek seeds crackle, add ground onion and little salt in to it. Saute for 5-6 minutes at medium heat until onion gets slightly golden color. Add coriander and cumin powder, black pepper powder, turmeric powder and amchoor powder in to fried onion and saute it for 1 minute.