Cut the green onions into small pieces and thinly slice the chikuwa.

Grate the potatoes and onion. Put into a bowl, add the egg and flour and mix together. Add Step 1, the salt, and the pepper. Mix together.

Put about 1 cm of oil in a frying pan and turn the heat up to medium. Put a ladle of Step 2 into the frying pan, shape into a patty, and slowly fry on both sides until crispy.

Transfer to a plate and top as you like with ketchup and mayonnaise.