500 g potatoes 1 L oil 2 spring onions 3 clove garlic 3-4 slices ginger 2 fresh chilli pepper 1 tablespoon sesame oil 1/2 teaspoon sugar 1 tablespoon oyster sauce 2 tablespoon rice wine 1 tablespoon soy sauce 1 tablespoon chili flakes 3 tablespoon toasted sesame seeds 1/1 teaspoon black pepper powder 2 teaspoon cumin powder 1/2 cup chopped coriander