Grapefruit marmalade

Place fruit in a glass bowl. Pour water over. Cover with plastic wrap. Chill overnight.

Transfer fruit mixture to a large heavy-based saucepan. Bring to the boil on medium. Boil 20 minutes, stirring occasionally.

Increase heat to high, add sugar. Bring to boil. stirring. Reduce heat to medium. Boil, without stirring, 30 minutes. Test for setting point (drop a teaspoonful onto a chilled plate, push with finger - if it wrinkles and skin forms, it's ready). If not set. continue cooking, testing every 10 minutes, until mixture reaches setting point.

Remove from heat. Transfer the mixture to sterilised jars and seal.