Here is how I usually do mine... It is easy, you can marinate overnight or you can just put it in the marinade for a few seconds, just depends on what kind of time you have on your hands.
Duck breast, cut into bite size cubes
Onion, cut into quarters
Bell Pepper, cut into quarters
Bacon, optional
Dales Seasoning Marinade
Toothpicks
Marinate duck in Dales Seasoning Marinade before or after you place on toothpicks. Soak your toothpicks in water, put a piece of onion on, then duck, then bell pepper. Wrap bacon around (optional). Place the little skewers on the grill, just don't over cook. You can also do the same thing with goose. This is easy and pretty quick to do. I believe you will like this. You can also sprinkle some brown sugar on them after they are on the grill if you like, doesn't hurt... Hope you enjoy!!