Wash the green moong and chana dal thoroughly. Soak them for 1-2 hours.
Set the Instant Pot to saute mode and add oil. Add garlic and saute until the garlic is lightly golden.
Add ginger and saute for a few seconds. Add onion and saute for 2-3 minutes (until onion is translucent).
Add tomato, green chili, turmeric powder, chili powder, cumin powder, coriander powder, and salt. Mix well.
Cover and let the tomatoes cook for 2 minutes. Add ¼ cup water and deglaze the pot.
Drain water from the soaked dal and add it to the IP. Add 6 cups water and mix well.
Close the lid of the Instant Pot and pressure cook for 10 minutes. Do a natural pressure release for 10 minutes, then do a quick release.
Set the IP in saute mode. Using a ladle or potato masher, mash the cooked dal well. Let it simmer for 2-3 minutes.
Add garam masala, cilantro, and crushed Kasuri methi. Mix well.
Serve hot with roti/chapati or rice.