Optional: 1/2 tsp mustard seeds, 1 bay leaf, jalapeno slices, 1 star anise
Instructions
Stuff the onion slices and bay leafs into a large jar or heat-proof container. Bring the vinegar, water, sugar and salt to a boil. Pour vinegar mixture over then onions. Allow to sit for at least 30 minutes or up to two weeks before serving.
Notes
If I’m making these at least 24 hours in advance, I almost always skip the boiling step and just add all of the ingredients to a jar, shake, and stick it in the fridge!