Put the nectarines, apples and onions together with the vanilla pod and the water in a large saucepan and bring to the boil, simmer until the fruits and onions are soft. Add the remaining ingredients and simmer without a lid for approx. 25 minutes on a medium fire until the mixture has become thick. Remove the vanilla pod. Pour into the sterilized jars and close immediately.
The chutney will keep in a dark, cool place for about 1/2 year.