01 - Slice the peeled ginger into thin, even rounds about ⅛-inch thick.
02 - Combine sliced ginger and water in a medium saucepan. Bring to a boil, then reduce heat and simmer for 35-40 minutes until tender.
03 - Drain the ginger, reserving ¼ cup of the cooking liquid.
04 - Return ginger to saucepan with reserved liquid and 2 cups sugar. Bring to a gentle boil, stirring frequently. Simmer uncovered over medium heat until syrup thickens and almost evaporates, about 20-25 minutes. Ginger should become translucent.
05 - Transfer ginger pieces using tongs or slotted spoon to a wire rack set over parchment paper. Cool for 10-15 minutes until tacky.
06 - Toss ginger slices in remaining ½ cup sugar while still tacky. Shake off excess sugar.
07 - Allow to dry completely at room temperature for at least 1 hour. Store in an airtight container at room temperature for up to 2 months.