There are some combinations that just work in the world of food, and duck with cherries is one of them and these burgers rock that combination perfectly.
Season the duck legs with salt and pepper all over.
Place the duck in a roasting pan (just large enough to hold the chicken), skin side up, and throw in the cherries (for the burger), mace and star anise.
Place the pan in the oven to slowly roast for two hours at 150°C or 300°F.
After 2 hours, remove the duck from the pan and the now "confit" cherries, leaving the fat in the pan (this is great to save for use later).
When the duck legs have cooled enough to comfortably handle, remove the skin and finely shred them with two forks and place them in a bowl.
Add the confit cherries, the egg and breadcrumbs to the shredded duck and form into two patties. Do not press too hard here and gently form them into rounds.
Allow them to cool in the fridge for an hour or so; this will help the duck fat solidify.
Cut the red onion into a 2-3mm (⅛") dice and place them in a bowl.
Pit the cherries (for the salsa) and cut them in half, then add them to the red onions.
Mix in the balsamic vinegar, lemon juice, pinch of salt and parsley and place in the fridge to get the flavours going.
Heat a scant coating of oil in the base of a pan, and when it is hot, fry the burgers.The meat is cooked, so all we need to do here is get a nice colour and heat through the duck meat, so a couple of minutes each side is fine.
Toast the buns whilst the burgers are frying and build your burger.