You've probably heard of apple butter, but almost any fruit can be made into a delicious, spreadable butter. You just need a bunch of fruit, a cup of sugar, a pinch of salt, some lemon and your trusty slow cooker. Photo by Karen Booth.
This is a fantastic way to preserve a big bounty of fruit, especially if you don't have any canning equipment at your disposal. The Kitchn has a great slideshow (linked below) that will walk you through the process, but it's not to complicated. Just clean and chop up 2kg of fruit, throw it in a slow cooker with sugar and salt, stir and cook on low for 10 to 12 hours, stirring every few hours and propping the lid open with chopsticks so steam can escape and the fruit can concentrate. Once it's done, stir in a couple of tablespoons of lemon juice, and blend it to a spreadable consistency.
How To Make Any Fruit Butter in the Slow Cooker [The Kitchn]