Cut the plantain and yam into large pieces. Add 1/2 cup water, turmeric powder, chili powder and little salt.
In the instant pot add the rinsed channa dal to the bottom, add enough water to cover the dal. Place the trivet on top and keep the bowl with cut veggies on top. Pressure cook for both together for 5 minutes. Allow it to natural pressure release for 10 minutes. Then open and check for doneness of each veggie and the dal. If dal need more cooking remove veggie bowl and cook just dal for another 2-3 minutes or as required.
The veggies should be 90% cooked and dal should break easily and have a grainy texture.
Add half dal and the veggies add the ground coconut mixture and cook until the most of the water evaporates. Cook on medium to low.
Put half this coconut mix into the veggie mixture mix well and switch off heat. Level the top and spread the rest of the coconut mix on top evenly. Cover and keep aside. While serving scoop from top to bottom so both the layers are served.
Notes
Roasted coconut can make or break the flavor of this dish hence pay close attention .