Wash, drain, halve and stone the nectarines and peaches. Cut the pulp into small pieces.
Put the prepared fruit pieces in a saucepan with vinegar, peach nectar and preserving sugar. Bring the ingredients to the boil while stirring and let simmer for about 5 minutes, stirring occasionally.
Season the chutney with chilli, salt and pepper, immediately fill the prepared jars to the brim, close, turn and let stand on the lid for about 5 minutes.
The amount is sufficient for 4 glasses of 200 ml each.