Step 1

Thinly slice your chunks of onion into C-shapes using a mandoline on the thinnest setting. (This is what I prefer – if you want the onions more chunky, adjust as needed.)

Step 2

Place the onions in a jar and add vinegar – I just eyeball it until the jar is about one third of the way full.

Step 3

Fill the rest of the jar with water. Add salt and sugar; shake a few times to combine.

Step 4

Let them rest in the fridge for 30 minutes to 1 hour – then they’re ready to use! They can stay in the fridge up to 5-7 days.