Ingredients

• 1 cup unfiltered apple cider
• 3 tablespoons finely chopped shallots
• 2 tablespoons cider vinegar
• 2 teaspoons grainy mustard
• 1/3 cup olive oil

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Instructions

1. Boil cider in a small heavy saucepan until reduced to about 1/3 cup, 12 to 15 minutes.
2. Whisk together reduced cider, shallots, vinegar, and mustard with 1/4 teaspoon each of salt and pepper. Add oil in a slow stream, whisking until combined.