Rinse the whole green moong dal under running water until water runs clear.
Turn on Instant Pot and set to sauté mode. Heat ghee/oil and add cumin seeds. Let them crackle.
Add diced onions and ginger garlic & green chili paste & saute until the color changes slightly.
Add chopped cilantro stems and spices - turmeric, red chili powder, coriander powder & dry mango powder, stir & sauté for 1 minute.
Add chopped tomato and cook until soft.
Add rinsed dal, water, and salt. Stir well. Cancel sauté mode.
Close lid. Set Instant Pot to pressure cook/manual high for 20 minutes.
Once done, allow natural pressure release for 10 minutes, then quick release remaining pressure.
Open lid, stir dal. Adjust salt and consistency as needed.
Garnish with fresh cilantro & lemon juice and serve hot with rice or roti.