Total Time
10mins
Prep 10 mins
Cook 0 mins

For panini sandwiches

Directions

  1. In a big bowl or big jar with a lid, submerge the onions in the vinegar and the water.
  2. Let sit for at least 12 hours or, covered, up to 2 weeks.
  3. Squeeze the excess liquid from the onions before using.

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