Small Sauces: Piquante

Reduce by two-thirds 4 oz (120 g) minced shallots, 4 fl oz (120 mL) wine vinegar, and 4 fl oz (120 mL) white wine. Add 1 qt (1 960 mL) demi-glace and simmer until slightly reduced. Add 2 oz (60 g) capers, 2 oz (60 g) sour pickles, cut brunoise, 1 tbsp (15 mL) chopped parsley, and ½ tsp (2 mL) dried tarragon.