Wash the lemon with a brush and remove the zest with ribbons. Squeeze out the juice from the lemon.
Peaches and apples cut into quarters, remove the seeds.
Pour peaches, apples and zest with sugar in a saucepan, let stand for 20 minutes, pour in 2 liters of cold water, bring to a boil, remove from heat.
Pour in the lemon juice, close the lid (or pour into sterilized jars and roll up), cool completely. Refrigerate before serving.