Heat the oven to 200 conventional/390° F/180 fan, Gas Mark 4.
Bake the potatoes whole in the oven for 20 minutes. Then leave to cool for 10 minutes and the place in the fridge for 15 minutes until cold.
Peel the potatoes and grate and leave to one side.
Peel and chop the parsnips. Smear with butter and season on a baking tray. Cover with foil and bake in the oven for 25 minutes.
Remove the foil and cook for approx. 10-15minutes until golden brown.
Remove from the oven and mash.
Fry the onions and add to the mashed parsnips with the grated potato, cheese and potato starch.
Check for seasoning. Add more if needed.
Roll into small cigar shapes and place into the fridge to set for an hour.
Remove, dip into the egg and roll in oats and place on a try. Pan fry until golden (place in deep fat fryer if you have one).