Heat oil in a non-stick pan. Add garlic and sauté for a minute. Add onion, mix and sauté till translucent.
Add ginger-garlic paste, mix and sauté well. Add chili powder, turmeric powder, salt and crushed peppercorns and mix well.
Add chicken mince, mix and cook till the chicken is fully done. Add coriander leaves and mix. Transfer in a bowl and cool.
Grate in the potatoes and mix well. Add breadcrumbs and mix again.