Soak 300gms sliced ginger in ice water with a little vinager for a few hours. Drain. The ginger should then be blanched in salty boiling water, drained, and allowed to cool. Bring to a boil and let cool the following mixture: 1 cup rice vinager 1/2 cup or more sugar 1 tablespoon salt 1/3 cup water After the mixture has cooled, add it to the ginger. Refrigerate. I use a vegetable peeler to slice the ginger nice and thin; a food processor does not work!