Ingredients
1 small sweet onion (such as Vidalia), halved and thinly sliced
1 small red onion, halved and thinly sliced
1 cup white-wine vinegar
1/2 cup sugar
1 tablespoon coarse salt
1 bunch scallions, cut into 2-inch lengths and slivered lengthwise
Ground pepper
Preparation
In a medium bowl, combine sweet and red onions; add ice water to cover. Soak for 30 minutes, changing ice water once. Drain onions well, and return to empty bowl. In a medium saucepan, bring vinegar, sugar, and salt to a boil, stirring until sugar is dissolved; pour over onions, and set aside to cool, tossing occasionally. When cool, stir in scallionos. Season with pepper.