Neratzi marmalade

Quarter the bitter oranges and place them in a bowl with water that should adequately cover them. 

Leave them in a cold place or the fridge for a week. 

Then, remove the seeds and blend them in a blender. 

Measure their quantity in cups and add the same amount of sugar. 

Boil over low heat for about half an hour. 

Store in sterilized jars.