Step 1

Very thinly slice the red onions from root to stem and add them to a jar.

Step 2

Add equal parts vinegar and water to a pot (enough to cover the onions) with a big pinch of salt. Bring to a boil and pour over the onions.

Step 3

Cover and let sit in the fridge for at least 2 hours before serving. The pink color will get deeper the longer they sit.

Step 4

Put them on everything.