Thinly slice the potatoes and then soak in clean water for couple of minutes to remove the extra starch.
Bring water to a boil and then cook the potato slices for 2-3 minutes. Transfer out and soak in cold water. Drain and set aside.
Prepare another small pan, add 1 tablespoon of cooking oil and fry garlic and scallions until aromatic. Place light soy sauce, cumin powder, chili oil, salt, sugar, vinegar, sesame oil and sesame seeds in. Mix well
Mix the sauce with the potato slices with a small bunch of coriander. Serve directly.