If you want to avoid all purpose flour in the chana balls, take the chana in a muslin cloth remove the excess water and put slight weight to get a little more solidified version. However, avoid squeezing out the water completely, other wise chana will turn in to paneer. Now cut the solidified version of chana into square pieces and fry them in oil. You can use these chana blocks and prepare the gluten free Bengali Chanar Dalna.