Ingredients (Makes 900g/2lb)
Halve the fruit and squeeze the juice into a bowl. Place the pips in a jug and cover with 600ml/ 1pt water. Set aside.
Shred and weigh the fruit and place in a heavy-based pan. Add 600ml/1pt water (including the pip water) for each 450g/1lb fruit and leave overnight.
Put the pips on a square of muslin and tie the corners to make a bag. Add to the pan with the oranges, bring to the boil and simmer for 2-3 hours until the peel is soft. Leave overnight to cool.
Measure the pulp and water. For every 600ml/1pt, add 450g/1lb granulated sugar. Bring to the boil, stirring, then simmer for 1 hour.
When the mixture reaches setting point (to test, cool a spoonful for a few minutes and push your finger across it to see if it wrinkles). Leave it to stand for 30-45 minutes then stir to distribute the peel evenly.
Spoon into sterilised jars, seal and label when cool.