Mother's Marvellous Marmalade

So this is about the simplest thing you can do;

Take 2 kilogrammes of cleaned and peeled berries - 1 kg of Red Currants and 1 kg of Strawberries (the amounts of berries are not precise; if you've got 1,5 kg of strawberries and only 0,5 kg of Red Currants - then what the heck... Mix with 1kg of Granulated Sugar in a large pot. Let boil like mad for two minutes. Then remove the foam which has been elaborated. Remove the pot from the heat; if you haven't done so. Let cool down for 15 minutes. Pour into preservative glass-jars and put the lids on while the content is still hot.

As the content is hot when you put the lid on, a Vacuum is created inside the jar which preserves it. This happens as you surely understand, because the density is higher when an element is cold than when it's hot. Thus, when the atoms contract a vacuum is created.

//OSS