Heat oil in a pan and add all the ingredients under the Header 'For the ground masala'. Saute for 7-8 minutes in low flame.
Then remove it from the pan and let it cool.
Grind it to a fine paste. Keep it aside.
Heat 1 tbsp oil in the same pan and saute onion and tomato for 10 minutes on low flame.
Add ground onion masala paste and chicken pieces. Add salt to taste. Pour 1/2 cup hot water and mix it well. Cover and cook for 20-25 minutes in low to medium heat.
Stir occasionally until the curry is thick to desired consistency. Then add some chopped coriander leaves and turn off the flame.
Heat a banana leaf in low flame for few seconds.Then place one parotta, pour chicken curry to cover it.
Now layer it with another parotta.
Fold the banana leaf all the sides and tie it with the thread.
Steam cook it for 10 minutes.
Remove and Enjoy!!