Serve leftover sauce with grilled chicken or pork, or freeze up to 1 month.
Combine sugar and next 4 ingredients in a medium saucepan. Bring to a boil.
Combine water and cornstarch in a small bowl with a wire whisk; add to soy sauce mixture. Return mixture to a boil; boil 2 minutes or until mixture begins to thicken. Cool completely.
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