Piccalilli

Place the malt vinegar and coriander seeds in a large preserving pan and bring to a boil. Add the cauliflower and onion and simmer for 5 minutes until slightly softened but still crunchy. Meanwhile, put the mustard, flour, turmeric and ginger in a small bowl and gradually whisk in the cider vinegar until smooth. Add the remaining vegetables, garlic and sugar to the pan and stir over the heat for 2–3 minutes until the sugar has dissolved. Drain over a large bowl to collect the vinegar.

Put the mustard mixture in the pan and bring to the boil. Gradually add the drained malt vinegar and simmer for 10 minutes, until thick enough to coat the back of the spoon. Add the drained vegetables and take off the heat. Spoon into sterilised jars – if they’re not kilner jars, cover them with plastic discs and elastic bands rather than metal lids, which can sometimes react with the vinegar.