To a large bowl, add all the vegetables. Then cover with water and stir in the salt.
Leave to soak for 1 hour.
After the hour has passed drain the vegetables.
To a large saucepan add the drained vegetables, vinegar, sugar, mustard powder, turmeric,ginger and nutmeg.
Mix thoroughly and bring the mixture to a simmer.
Simmer for approximately 10 minutes, until the vegetables are tender.
Whilst the vegetables are cooking, you can sterilize the jars.
Wash the jars with hot soapy water, rinse then dry in a low oven.
Once the vegetables are tender, mix a little water with the flour to make a paste .
Stir this paste into the vegetable mixture and simmer until the mixture has thickened.
Fill the jars with the piccalilli and seal the jars.
Once opened consume within one week.