Iranian Potato Patties Sandwich

Iranian crispy potato patties, which is called Kookoo sibzamini کوکو سیب زمینی in Farsi, is a classic dish. First of all, I should give a brief description about what is kookoo کوکو. In cookbooks from Safavid Dynasty امپراطوری صفوی (about 400 years ago), mention kookoo. Kookoo/kuku کوکو is a popular Persian dish patty with eggs