Press the Sauté button and turn on the Instant Pot. Once it's heated, add the oil. Add mustard and cumin seeds. Let the cumin seeds brown and sizzle.
Add chopped onion. Sprinkle some salt over it and sauté for 3 minutes. Add minced ginger and garlic, and sauté for another minute.
Add the chopped tomato along with turmeric, amchur powder, red chili powder, garam masala, coriander and cumin powder. Sauté for 2 minute. Add the grated coconut and mix it well.
Add the drained black chickpeas and water, then give it a good stir. Deglaze the pot by scraping off any brown bits that may have stuck to the bottom. Cancel Sauté, then close the lid and vent sealed. Choose high pressure, Bean / Chili setting or use pressure cook or Manual for 30 minute.
Once cooking is done, wait for the pressure to release naturally for at least 10 minutes, followed by a manual release (quick release). Open the lid when pressure is released.
Taste and adjust the seasoning. Using the back of your ladle, mash a few beans to make thicker creamy curry. Garnish with fenugreek leaves and chopped cilantro leaves. Serve and enjoy !