Combine all ingredients, except cornstarch, in a small pan
Bring to a boil, reduce to simmer
whisk in cornstarch until desired consistency is reached (like a thickened gravy)
Notes
I remember this from when my parents did baked hams when I was a kid. I wasn't much of a fan since I don't like raisins, but this would make a nice pineapple finishing sauce for ham without the raisins
The directions are assumed, all I have are the measurements.