Sticky hoisin duck burgers with sweet potato fries

By Donal Skehan From Saturday Kitchen Ingredients For the duck burgers 1 prepared aromatic duck 6 spring onions, thinly sliced 1 cucumber, thinly sliced 1 carrot, peeled and sliced with a julienne peeler 4 brioche burger buns, toasted 2 tbsp vegetable oil 4 free-range eggs …