The tender leaves of chickpeas plant are perfectly edible. Just throw some brown or green chickpeas from the pantry in the soil and see them grow. If you do not harvest the leaves, the plants will bear tender chickpeas in pods. However by then, the leaves may be too rough to be used.
Recipes to try -
(1) Harbharyachi Paale Bhaji
(2) Harbharyachya palyacha zunka
(3) Harbharyacha palyachi gola bhaji