Reheat the BBQ duck in an oven then slice the meat and skin and place on a serving plate.
Heat the pancakes in a microwave or steamer. Cut the avocados in half, slice and lay on another platter with the cucumber and spring onion.
To serve, spread a pancake with a little sauce, top with some cucumber, duck, shallots and a slice of avocado. Season the avocado with a pinch of salt, wrap up and enjoy.