Absolutely Fail-Proof Easy Marmalade - cooking recipe

Ingredients

6 6 grapefruits (or any combination) or 6 lemons (or any combination)
1 kg sugar

Preparation

Take the 6 citrus fruits and wash well, removing any blemishes.
Cut into quarters, and place in a food processor.
Chop until finely ground, skin and all.
For an optional extra add some crystallized ginger.
Boil with the 1 kilo of sugar, stirring occasionally with a wooden spoon, for 20 minutes.
It splatters, so be careful.
This quantity fills about 5 x 340 gram jars.
Do not double the ingredients, rather make two batches.
It never goes dark and lasts for up to 6 months in the refrigerator without the need to sterilize the bottles.