Take chicken in a
bowl, add ginger, garlic, spring onion bulb, soy sauce, sake wine, sugar and refined flour and mix well. Keep the bowl in the refrigerator to marinate for 15-20 minutes.
Get the bowl out of
the refrigerator and add cornflour and mix well.
Heat sufficient oil in a
wok and drop small roundels of this mixture into the hot oil. Deep-fry till golden brown and drain on absorbent paper.
To make sauce, heat
oil in a non-stick pan, add spring onion bulb, soy sauce, sake wine, vinegar, sugar and spring onion greens and saute.
Add the fried chicken
and cook for 2-3 minutes.
Slit the hot dog rolls
into half lengthwise without cutting through and apply some mustard mayonnaise in the inside of the rolls. Keep a lettuce leaf in each roll and top it with chicken mixture.