Nutrition values are an estimate. Roasting time varies with the size of the duck legs; keep going until the meat pulls easily from the bone. Duck breast can be used, but legs become far more tender and shreddable when cooked low and slow. Store leftover shredded duck in an airtight container in the fridge for up to 3 days and reheat gently in a skillet over medium-low heat with a splash of water. Store the cucumber, spring onions and pancakes separately. The cooled shredded duck freezes for up to 3 months.