Method1. First, sterilise your jars. Wash 3-4 x 450g (15.9 oz) jars and their lids in hot, soapy water.
Place them on a baking sheet and let them dry completely in an oven set to 140°C (275°F) / 120°C Fan / Gas Mark 1. 2. Prepare all your vegetables, apples, and chilli as detailed in the list. 3.
In a large pan, combine the white malt vinegar, sugar, and bay leaves.
Bring the mixture to a rolling boil. 4.
Working in batches if necessary, carefully drop the prepared vegetables, apples, and chilli into the boiling vinegar. As soon as it returns to the boil, immediately remove them with a slotted spoon and set aside on a tray. This quick blanch keeps them crunchy. 5.
Remove and discard the bay leaves from the vinegar.
Whisk in the ground cumin, ground ginger, turmeric, and English mustard powder until smooth and free of lumps. 6.
In a small bowl, mix the cornflour with a little cold water to create a smooth slurry. 7.
Bring the spiced vinegar back to a boil.
Whisk in the cornflour slurry and simmer for 20-30 seconds, stirring constantly, until the sauce thickens. 8.
Turn off the heat. Return the blanched vegetables, apples, and chilli to the pan.
Stir everything together and season with sea salt.
Taste the sauce—if it's too sharp for your liking, add a little more sugar. 9.
Let the piccalilli cool for about 5 minutes. Carefully ladle the hot pickle into the warm, sterilised jars, ensuring you leave a small gap at the top. 10. Screw the lids on tightly while the jars and pickle are still hot. This helps create a vacuum seal as it cools. Allow to cool completely before storing in a cool, dark place for up to 8 weeks.
While delicious immediately, the flavours will deepen and mature if you let the piccalilli rest for a week or two before opening.