This stew is not a traditional Thai dish, but it still has some similar flavors and that wonderful creaminess. It was created at a friend's house in a coking frenzy to use up her extra eggplant.
Add the water and onion to your Instant Pot and use the saute function. Cook until the onions are translucent. Then add the garlic and mushrooms.
Cook until the mushrooms have released all their liquid. Turn off the heat.
Add all the sauce ingredients to your blender and blend until smooth. Taste and add more cumin, or coriander if needed or jalapeno if you want to add some more heat.
Add the sauce, eggplant, mushrooms, and tofu to the onion-mushroom mixture. Cover and cook on high pressure for 15 minutes.
Manually release the pressure, taste and add more salt if needed. Serve over a bed of steamed rice.