• Wash, cook, and grate potatoes.
• Skin and grate onion.
• Place all the ingredients in a bowl. Break and add eggs.
• Mix well to combine.
• Heat some oil in a frying pan, drop a spoonful of the mixture into the pan (the size of the patties depend on the size of the spoon you use).
• Turn over the patties when one side is brown.
• Lay the patties on paper towel to remove excess oil.
• serve this frittata with bread and sabzi khordan, Nan Barbary, Nan Taftoon or with steamed rice (Kateh or Chelo)
• Now enjoy (nooshe jan). 

You can make this kookoo in any size and in any shape.