With such a good price for duck, perhaps you'll want to create multiple duck dishes. Here's a duck recipe that is quite different from those suggested above. It's from Peru, and it's yummy. (It's my version of a dish taught to me by a friend who lived in Peru, so not ignoring any copyright laws here. This is mine to share.)
Arroz con PatoDuck with Cilantro Rice
5- to 5-1/2-pound duck, cut into 6 to 8 serving pieces
1/3 cup lemon juice
1/2 tsp. ground cumin
1 tsp. salt
1/2 tsp. freshly ground black pepper
1/4 cup olive oil
3 12-ounce bottles of beer
2 cups long grain white rice
1 cup finely chopped fresh cilantro
1 cup cooked fresh green peas or thoroughly defrosted frozen peas.
Trim as much fat as possible off the duck. Mix the lemon juice, cumin, 1/2 tsp. salt, and 1/4 tsp. black pepper, then use your fingers to brush each piece of duck with the mixture. Place the duck in a plate large enough to accommodate pieces in a single layer. Pour over any of the lemon juice that is left. Cover the plate with foil, and let it rest at room temperature for 3 hours or refrigerated for 6 hours, turning pieces once or twice during this time.
Remove the duck pieces from the marinade. Prick the duck’s skin in a few places with a fork or knife tip. (This will permit fat beneath the skin to escape during browning.) Discard any remaining marinade.
In a large saucepan or casserole, heat the oil over high heat until a light haze forms above it. Add the duck and brown it well on all sides, turning frequently. Drain off and discard (or save for another application) all but 2 Tbs. of oil/fat from the pan. Pour the beer over the duck, and bring to a boil over high heat, scraping any bits of brown from the bottom or sides of the pan into the liquid. Reduce the heat to low, cover the pan, and let the duck simmer for 45 minutes, or until a leg shows no resistance when pierced with the tip of a knife. Transfer the duck to a heated plate and cover with foil to keep warm.
Pour off the liquid from the saucepan, strain, and measure. You should have about 4 cups of liquid.* Return the liquid to the pan. Bring the broth to a boil, stir in the rice, and return to a boil. Reduce the heat to low, cover the pot, and simmer undisturbed for 20 minutes, or until the rice has absorbed all the cooking liquid. Stir in the cilantro, peas, and remaining 1/2 tsp. salt and 1/4 tsp. black pepper. Arrange duck pieces on top of the rice, cover the pan, and return pan to low heat for a few minutes to heat duck through. Serves 4.
Note: The beer you use should be a pale, golden or ale-type beer, not a dark beer, which will overpower the flavor of the duck.
*If the amount of liquid/broth differs from this by more than 1/2 a cup, adjust the quantity of rice according to the directions on the package of whatever rice you’re using. If you have well over 4 cups, you may also want to check to see if there is a lot of fat, and adjust the amount by skimming some of the fat off the broth.