Lightly scratch peach skin, scald peaches with boiling water, rinse with cold water and peel off the skin. Halve the peach, remove stone. Cut the flesh into small cubes.
Peel the mango, cut the flesh from the stone and also dice it finely. Weigh 1 kg of flesh. Wash and dry lemon. Peel the rind with a zest ripper, squeeze the juice. Mix well the weighed pulp, jam sugar, lemon juice and rind in a large pot.
Bring to the boil while stirring continuously at high heat. Leave to boil for at least 3 minutes while stirring. Pour jam into prepared, clean twist-off jars, close them and place them on the lid for approx. 5 minutes.