Place potatoes with the skin on into a pan and cover with cold water and bring to the boil. Reduce the heat and leave to cook gently until soft. Drain and cool.
Once cooled, peel the skin off with your fingers and discard. Grate the potatoes into a bowl and add the salt, garam masala, chilli, coriander, grated ginger, chilli powder and mix together.
Wet your hands, to stop the mixture sticking to your fingers and take a ball of the potato mixture. Shape into small patties or tikki, roughly 5cm in diameter and about 3cm thick.
In a separate bowl, sieve in the gram flour and gradually pour in a little water to make a thick batter then add the cumin seeds
Dip one aloo tikki into the batter until it's covered and then carefully place it into on the grill. Cook until golden brown (2-3 minutes)
Remove and serve while its hot