Step 1

Measure the water, vinegar, and sugar into a saucepan and add a generous pinch of salt.

Step 2

Bring the pickling solution to a boil, stirring to allow the sugar to dissolve.

Step 3

Finely dice the red onions into thin strips and place them into prepared sterilized jars.

Step 4

Pour the hot pickling liquid over the red onions. Make sure the onions are completely covered but that there is still around a finger width margin of space at the top of the jars.

Step 5

Let the pickled onions cool before screwing on the lids and placing them in the fridge. Leave them overnight and then consume within 2 weeks.