I wished I had some duck breast. A friend of mine is a real big duck hunter. He cooked some for me once..I do not know what he marinated it in, but it was the best wild game eating I ever had
Try this: 1cup olive oil
1/2 cup balsamic vinegar
2tbs Italian seasoning
1/4 cup worcheshire sauce
salt and pepper
1tbs of mustard
marinate over at least two hours and grill to medium