Switch on the Instant Pot and Press "SAUTE MODE" and when it displays ON or HOT, add oil, cumin and bay leaf.
Once cumin roasts, add finely chopped onions, ginger garlic paste. Sauté well for couple of minutes.
Add tomato puree and mix. Now add the spices - Turmeric, red chilli powder and garam masala. Mix well. Cook this for a 1-2 mins.
Now add the soaked and drained black gram lentils + kidney beans, 3 and 1/2 cups of water, salt to taste. CANCEL SAUTE MODE.
Close the INSTANT POT lid. Set the pressure release valve to "SEALING". Pressure cook for 35 minutes at HIGH PRESSURE.
After 35 minutes, you can either do a manual release (move the pressure release valve to VENTING) or allow the pressure to reduce naturally (NPR) for 8 to 10 mins.
Switch on the Sauté Mode and using a potato masher, mash the lentils gently. Switch OFF Sauté Mode. Note - Don't mash the lentils completely. Mashing helps in thickening the dal and makes it naturally creamy.
Crush Kasuri Methi between your palms and sprinkle over the dal. Mix.
Next, add the cashew cream (reserve a tbsp for serving / garnish). Mix and Serve.