Blender Chunky Marmalade

• 2lb/1 kg Seville oranges
• 1 lemon
• 4

Cut the fruit in quarters and take out the pips. Tie the pips in a piece of muslin and suspend in a pan. Put small quantities of the fruit with some of the water into an electric blender and blend on high speed until chopped. Pour into the pan and continue the process until all the fruit has been chopped. Add any remaining water. Simmer for 1 hour. Take out the bag of pips and squeeze the juice