As an unconventional accompaniment to his juicy grilled chicken, Thomas Keller likes to serve pickled pearl onions, which add a sweet, tart bite. The vinegary mixture is great for pickling other vegetables, like baby carrots and Kirby cucumbers.
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16 white pearl onions (about 1 cup), root ends trimmed and scored with an X
1/2 cup water
1/2 cup red wine vinegar
1/2 cup sugar
1 1/2 tablespoons mustard seeds
1/2 teaspoon coriander seeds
1/2 teaspoon black peppercorns
How to Make It
In a medium saucepan of boiling salted water, cook the pearl onions until just tender, about 8 minutes. Drain, rinse under cold water and drain again. Transfer the onions to a glass bowl.
Meanwhile, in another medium saucepan, bring the water and vinegar to a boil with the sugar, mustard seeds, coriander seeds and peppercorns. Boil until the sugar is dissolved, about 2 minutes. Pour the liquid over the onions and refrigerate for at least 1 hour and up to 2 days. Drain before serving.
The drained pickled onions can be refrigerated for up to 2 weeks.