Hara Channa Aloo Ki Biriyani/Vegan Green Chickpeas & Potato Briyani

My recent find in Indian grocery is a packet of frozen green channa, seriously i was the happiest person in the world. Yes i have been looking for this fresh green channa since a long and finally i saw them in frozen section. Without any hesitation i grabbed a packet happily. I have been hunting for this green channa since a long and everytime i go for Indian grocery, i will ask the saleman