Before making the colocasia leaves curry, apply coconut oil to your palms and start peeling the terre/colocasia stems. Finely chop the stems and leaves.
Wash and soak the pulses i.e. chana dal for atleast 30 minutes.
After 30 minutes, take a pressure cooker and add the chopped leaves, stems, chopped jackfruit seeds and dal along with ½ cup water.
Pressure cook for 5 whistles or till dal is cooked. Switch off the gas and wait for the pressure from the cooker to be released naturally.
Add all the ingredients meant for the masala gravy i.e. grated coconut, tamarind, dry red chillies and coriander seeds along with ½ cup water and grind into a thin smooth gravy.
Heat a deep kadai/heavy bottomed pan. Add 1 teaspoon oil in it. After oil gets heated, add mustard seeds. After mustard seeds flutter, add curry leaves and fry for ½ minute. Pour the gravy from mixer/grinder into it.
Mix the contents from the pressure cooker in the masala gravy and mix well.
Add jaggery and kokum petals and mix.
Let it simmer.
Add salt to taste and mix.