Duck Breast a l'Orange

INGREDIENTS

• 1/4 cup sugar
• 2 tablespoons sherry vinegar
• Zest of 1 orange (2 teaspoons), 1 cup fresh orange juice, plus 1 orange, supremed
• 3/4 cup chicken broth
• 1 shallot, minced (3 tablespoons)
• 2 boneless duck breast halves (8-10 ounces each)
• 1 teaspoon coarse salt
• 1/4 teaspoon ground black pepper