Three-fruit marmalade

Wash and dry the fruit, then halve and squeeze the juice into a jug. Scoop out the pips and white membrane from the fruit halves with a spoon or small knife and tie together in a muslin bag. Finely chop the peel – either with a knife or in a food processor.

Place the peel, muslin bag and squeezed juice in a preserving pan. Add 1.4 litres cold water and leave overnight to soften.

The following day, bring the mixture to the boil and simmer gently, uncovered, for 1½-2 hours until the fruit is tender and the contents of the pan have reduced by half.

Warm the sugar in a roasting tin in a low oven (150ºC, gas mark 2) for 5-10 minutes. Meanwhile, remove the pan from the heat, take out the muslin bag and squeeze firmly between 2 plates to remove all the liquid – this contains the pectin and is important for a good set. Add the sugar and stir until dissolved. Return to the heat and bring to a fast boil. Test for setting point after 10 minutes: place a little marmalade on a chilled plate, run a finger through it – if it wrinkles, it’s ready. If not, return to the heat and check again every 5 minutes or so until set.

Skim foam from the surface with a spoon, then cool for 5-10 minutes until a skin forms on the surface. Stir to distribute the peel, then pour into warm, sterilised jars. Seal, label and store in a cool, dark place for up to a year. Once opened, store in the fridge for up to a month.