There's nothing like opening a jar of June in the dead of February. This is the plain old way my mother put up fruit — no pectin, no special equipment, just a little patience and a cold plate to test it on. Make a double batch while the berries are sweet. You'll be glad of it come winter.
Bonnie's tip: A jar of this with a ribbon round the lid is the nicest thing you can hand a neighbor for no reason at all. I keep a few back just for that.