This preparation from New York City's Gramercy Tavern turns humble onions into a jammy condiment, perfect for grilled steaks or smoked salmon.
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- 1⁄4 cup red wine
- 2 Tbsp. extra-virgin olive oil
- 1 medium yellow onion, finely chopped
- 1 Tbsp. beet cooking liquid (from Pickled Onions)
- 3 Tbsp. port
- 2 Tbsp. raspberry vinegar
- 1 tsp. sugar
- Kosher salt
Reduce wine in a 2-qt. saucepan over medium-high heat until 1 tbsp. remains. Pour wine reduction into a bowl and set aside; wipe out saucepan. Heat oil in saucepan over medium-high heat. Add onions and cook, stirring occasionally, until soft, about 10 minutes. Add beet cooking liquid and wine, along with the port, vinegar, and sugar; cook, covered and stirring occasionally, until onions are tender and deep red, about 20 minutes. Season with salt and let cool to room temperature.