Instructions

  1. Blanch 2 sliced red onions in a small saucepan of boiling water to cover for 1 minute and drain in a colander.
  2. Then return them to the pan and add a cup of cider vinegar, a teaspoon of salt, and just enough cold water to barely cover the onions.
  3. Bring to a boil over high heat and simmer the onions 1 minute.
  4. Transfer the onions and brine to a glass jar and chill.
  5. The onions will turn the color of a pink piñata and will get crisp as they cool.
  6. They'll keep for weeks in the refrigerator.