Since you are reading this you probably already know all the health benefits of lingonberries, and how good it tastes on oatmeal, so I'll skip that part and go straight to the making of it. It's incredibly easy.
* 1 kilo organic lingonberries (frozen is fine)
* 3 - 4 deciliter organic raw cane sugar (or any sugar you prefer)
# How you do:
Pour the lingonberries into a pot and add the sugar. Stir while you wait for it to boil. Let it boil for 2 or 3 minutes. Let it cool off before you put it in the fridge.
The sugar and benzoic acid in the lingonberries mean you don't need any preservatives. The berries also contain pectin which makes the jam gel when it cools down.