Put all ingredients into a blender (including juice from pineapple can) and process until smooth. Simmer over low heat, uncovered, until mixture thickens; about 25 minutes.
Pour into a clean jar and refrigerate until ready to use. Keeps up to 2 weeks.
Cook's Note: Allow to cool before using, if sauce is to be used right away.
Quick Version (no ginger): Combine pineapple (with syrup), cornstarch and soy sauce and proceed as above.
Submitted by: CM