
Good pineapple tarts start with good pineapple jam. Where does good pineapple jam start?
Readymade, in a plastic bag? Common sense tells you that jam stored without refrigeration for god knows how long, in a plastic bag which can't be sterilized and isn't vacuum sealed, must be stuffed full of preservatives. And yet, the ingredients listed don't include preservatives. I wouldn't eat that kind of jam even if you paid me.
There's no reason why readymade pineapple jam can't be good, in theory. In practice, however, all those I've seen are of extremely dubious quality.
Making good pineapple jam is quite straightforward. It's basically mashed pineapple cooked with sugar till thick, and flavoured with star anise, cinnamon and sometimes cloves.