My original intention was to mash the berries coarsely, but lacking a good mashing tool, I resorted to a mini food processor. Four heaping pint baskets will give you roughly the four cups of mashed berries you need to make freezer jam.
It's exceedingly tasty! With berries this sweet, I could have cut the sugar to a cup. The mixture didn't seem to jell a whole lot, but that's not really a problem. The problem is not grabbing a spoon and eating the entire container at once.
It's good with ice cream or shortcake, too. Natch.