Ingredients
1 1/2 cups red wine vinegar
2 tablespoons sugar
1 tablespoon kosher salt
1 medium red onion, peeled, halved, and thinly sliced
Preparation
Step 1
Combine the vinegar, 1/4 cup water, the sugar, and the salt in a small saucepan and bring to a boil. Remove from the heat and let cool for 10 minutes.
Step 2
Put the onions in a medium heatproof bowl, pour the vinegar over them, cover, and refrigerate for at least 4 and up to 48 hours.
