There are couple of ways you can make moth bean in the Instant Pot.
RInse Moth beans under cold water 3-4 times rubbing them gently between fingers. Drain water and fill fresh water.
If pre soaking matki / moth bean then add double the water for soaking. Before cooking discard water and add fresh water with 1:2 Moth bean water ratio for cooking
This will yield cooked moth bean which you can use as needed. ( Wont be watery or soupy).
I like to cook Moth bean on High Pressure with black Knob on SEALING position and Natural pressure release.
1st option- Direct cooking the beans in the pot without soaking. ( Cook time – 15 minutes NPR)
2nd option - Direct cooking the beans in the pot with pre-soaking 1 hour. ( Cook time- 9 minutes NPR)
3rd option – Pot in pot method where you place a trivet with some water inside the pot. You will need another smaller size instant pot safe bowl where you will place the moth beans plus water to cook. I do this when I don’t want the Inner pot to get messy and intend to use it again for some other recipe. ( Cook time – 17 minutes NPR for un soaked beans and 12 minutes if soaked for 1 hour. )
4th option - If I intend to cook rice with the beans I prefer soaking the beans to match up the time with rice and do pot in pot method. That is I place the soaked beans directly in the inner pot with water. Then I put the long leg trivet inside the pot. On the trivet I place the rice bowl. (Pre soaked beans for 5-6 hours. Cook time – 4 minutes NPR) Soaking rice not needed.
With the pot in pot method both the bean and rice are cooked in one shot.
Choose the method that suits you the best.
The recipe for Moth bean kadhi with step by step photos and dry moth bean sabji is given below.The nutrition calculation is for cooked Moth beans per serving ( serving size - 4 people.)