Remove the skin, pith (called as mav or mau in Konkani) & seeds of the raw jackfruit. Take care to see that you oil your hands using coconut/vegetable oil while handling this as the whole process can get messy with the sticky white gum (sap) oozing out of the Jackfruit that can be hard to get rid of. Shred the cleaned chunks of jackfruit and soak the shreds in water mixed with a little tamarind juice immediately or else it will turn black.
Pressure cook/boil the black chana with a little salt till well cooked. Retain the stock (even if you dont utilize this stock for this preparation, never throw away stock in which vegetables have been cooked. You can convert them into a delicious & nutritious broth/soup.
Pressure cook the Jackfruit shreds with a little salt & water (sufficiently upto the level of the jackfruit - not more as you are just preventing the jackfruit from getting burnt) for about 10-15minutes. Use a weight (whistle) and count about 5 whistles. Let the weight loosen up before you open the cooker to mix the contents well .
In a large wok/pan heat some oil & fry the sliced onion to golden. Add 2 tsps of vegetable powder & fry on slow fire. Add the jeera powder & fry some more.
Toss in the grated coconut and fry till you get a nice aroma. Add the tamarind juice and the Chana & Jackfruit along with the stock of each. Mix well and adjust salt if required (remember - both the vegetables have been pressure cooked with salt, so you wont really need to add again)
Cook on slow fire for about 10 minutes, stirring every now & then and adding. Ensure that the water has been absorbed by the vegetables and the gravy has thickened. Turn off the flame.
For the tempering - heat some oil in a smaller pan & add the mustard seeds. When they begin to splutter, add the curry leaves and stir quickly for about 2-3 seconds before tossing in the red chillies. Fry till you get a fantastic flavour (my most favourite!) but dont let the chillies burn! Add the garlic cloves slightly mashed up. Let the garlic blend along with the rest of the ingredients. Immediately add this to the vegetable. Garnish with chopped coriander.
Serve hot with rice (preferably boiled rice). Enjoy!