Press SAUTE on Instant Pot. Add oil, once it's hot add cumin seeds, bay leaf and let the cumin splutter.
Then add onions, minced ginger and garlic and saute until onions for 3-4 minutes or till they turn light brown.
Next add tomato puree and the spices like red chilli powder, turmeric powder, coriander powder, garam masala and cook for 2 minutes.
Lastly add soaked chickpeas, water and salt. Stir well.
Close the Instant Pot with pressure valve to Sealing. Cook on High Pressure for 35 minutes. Once the pot beeps, let it release the pressure naturally (NPR) for 10 minutes.
Remove lid away from you, add spinach, amchur powder, and give a quick stir. Turn on the Saute again and boil for 2 minutes till the spinach wilts.
Chana Saag is ready, serve with hot rice, chapatis, roti & parathas.