Jam hot.

Today's project:
Pick plums

(Don't worry, I picked some myself too!)

Put plums in pan with water:

Put pan on stove.  Turn on stove and cook until mushy:

Add sugar and heat to 105 degrees:

 Leave for 10 minutes to cool.

 Retrieve jars from dishwasher (sterilising...)

 Put jam in jars and seal:

 Simple.
(1kg, 1.4 litres and 1 kg, if you're wondering)