Ingredients:
- 6 large boneless duck breast fillets, skin on
- Salt and freshly ground black pepper
- 2 tablespoons oil
- 1/4 cup balsamic vinegar
- 1 cup red wine
- 1 cup chicken or duck stock
- 1/3 cup brown sugar
- 3 sprigs fresh rosemary
- 2 cups berries: blueberries, raspberries, or blackberries
- 2 tablespoons butter
