Peel and chop the nectarines into small chunks. Likewise the onion. Zest the lemon and extract it;s juice. Peel the ginger.
In a medium heavy bottomed casserole heat the onion, sultanas & nectarines over a low flame. Add the water and stir occasionally for about 10 minutes.
When the fruit has softened, add the other ingredients and bring to the boil.
Turn down the heat and, stirring regularly, simmer away for about ½ an hour until it's nice and thick.
Allow the chutney to cool, then take out the ginger. Use immediately or pop into a clean jar and put into the fridge.