Recipes: Grilled spiced duck breasts with blackberries

Preparation:        Preparation time: 15 mins  Cooking time: 25 mins  Serving: 10 Ingredients: 1 cup balsamic vinegar 1-quart blackberries Salt and freshly ground pepper Ten 6-ounce boneless Pekin duck breast halves, with skin 1 tablespoon ancho chile powder 1 1/2 teaspoons ground coriander 1 teaspoon ground cumin 1 teaspoon dry mustard powder Instructions: In a medium saucepan, boil...