In Indonesia, they use a kind of sago palm starch called sagu instead of corn starch. However, timus can still be prepared with regular corn starch. Please try them as soon as they're fried, while they're still crispy.
I first made it with 1 kilo of potatoes, but it was so good, I used 2 kilos from the second time.My helper Nuru taught me this recipe.
Adjust the amount of sugar you need according to the sweetness of your sweet potatoes. If you prefer a chewier texture, use a little more corn starch.
Enjoy Japanese food around the world.