Small Sauces: Diable (Deviled)

Reduce by two-thirds 8 fl oz (240 mL) white wine, 4 oz (120 g) chopped shallots, ½ tsp (2 mL) crushed peppercorns. Add 1 qt (960 mL) demi-glace and simmer 20 minutes. Season with cayenne to taste and strain.