1. Rinse chicken feet; in a pot of hot water, cook ginger, scallion and chicken feet until softened.
2. Boil a separate pot of water, mix in bonito dashi powder, then add soy sauce and mirin. When it boils up again, add dark soy sauce, mix well, remove from heat and place the pot in ice water bath to cool down.
3. Drain the chicken feet and place them under cold running water to rinse the gelatine off the chicken feet, hence making the meat crunchy. Cut the nails off and trim the bones on the chicken feet.
4. In a pot of boiling water, blanch the chicken feet, drain, then cool in ice water, drain.
5. Add Japanese sake in the cooled dashi mixture, then pour the chicken feet in, seal with cling film and refrigerate overnight. Serve when the chicken feet absorb flavour of the sake and dashi mixture.