Why? Because you can! And pickle, and jam, or otherwise celebrate the resurgence of the domestic arts our forebears held so dear. Put on your best apron and step into our kitchen, won't you?
It's the way our great-great-grandmothers likely would have preserved jam. With honey and a little fermentation, making a delightful, healthy way to preserve freshly-picked blueberries.
Freezer jam requires no cooking, just mashing and then you have jam. Plus it uses a lot less sugar than traditionally canned jam because you don't need the sugar to act as a preservative.