
Into a large bowl add the chopped courgettes, red peppers, green peppers, celery and onions.
Let stand overnight.
Drain the vegetables then rinse thoroughly with cold water.
Drain and rinse again.
Place in a large pan (a preserving pan is perfect).
Stir in the vinegar, sugar, nutmeg, mustard seeds, turmeric, celery seeds, black pepper, chilli and cornflour.
Bring to a boil
Reduce the heat and simmer for 20 minutes.
Ladle into hot, sterilized jars.
Seal with jam pot covers and allow to cool. The cellophane will tighten as it cools creating an air tight seal.