Take the raw banana, pinch of turmeric, salt & tamarind paste with 1cup of water in a medium sauce pan. Cover & simmer until the veggie is tender and almost all the water is evaporated.
In a sauté pan, heat 2tsp oil and add all the tempering ingredients.
Once the seeds start to splutter, add green chilies and cooked banana.
Sprinkle in the poriyal powder and grated coconut. Mix well and cook for 3-5 minutes for the flavors to blend.
Serve hot with steamed white rice.