3 tablespoons Shaoxing rice wine
1 tablespoon soy sauce
1/4 teaspoon salt
1/8 teaspoon plus one pinch five-spice powder
4 duck breasts (5 to 7 ounces each), patted completely dry with kitchen towels
2 tablespoons hoisin sauce
2 scallions, thinly sliced, for garnish
Shaoxing rice wine can be found at Asian specialty markets or online.