Heat 2 tbsp oil in your Instant Pot set to sauté mode.
Add the mustard seeds.
Once they start to splatter, add cumin, asafetida, and curry leaves.
Sauté for 2-3 min and add the daal and water.
Next, add the tomato purée, rasam powder, tamarind concentrate, and salt.
Mix well and cook for 5 minutes on high pressure.
Allow the pressure to naturally release for 25 minutes before opening the lid and adding in the cilantro.
Serve over rice and with a side of crispy potato curry or green bean curry (my favorite way to eat it)