To make the pickling liquid, pour hot water, sugar and salt into a glass measuring jug and give them a stir to dissolve.
Then add the white wine vinegar to the hot liquid and give it a gentle mix to combine. At this point you can add any other flavors if you like. You can try garlic cloves, coriander seeds, wholegrain mustard seeds, peppercorns, or fennel seeds.
Next, wash and slice up the radishes as thin as you can. You can vary the thickness for additional crunch.
Once the radishes have been sliced up, place them in a clean jar and fill the jar with the pickling liquid. The liquid should still be warm which will help to soften the radishes as it works its pickling magic.
Keep uncovered on the kitchen bench to allow the jar to cool before securing the lid and placing it in the fridge. The pickled radishes are ready for eating after about 1 hour but the flavor will develop over the next day. Enjoy!