I pressure cooked the potatoes wholly, drained them, cooled them completely before peeling and mashing them. This way, the water content would reduce drastically.
Ensure to squeeze the soya so much that there is no water at all. Soya, paneer and potatoes can make the mixture soggy.
If there is too much moisture in the mixture, add sufficient bread crumbs. The end taste would differ but we wouldn't want a soggy mixture which would disintegrate into hot oil!
Dipping in the cornflour slurry was a challenge! We are so used to using egg as a binder, this was the first time I was doing it. My umma was really not happy. Ensure to dip the cutlets completely in the cornflour slurry and coat sufficiently with bread crumbs. The cutlets which were well coated managed well in the deep frying while some did break on one side, which I am sure was due to non-sufficient (or impatient!!!) dipping in the cornflour. For ease, you can easily replace the cornflour slurry with a couple of well beaten eggs!