Combine salt and peppers. Rub the inside and outside with the salt mix. Fill a large wok with peanut oil and heat until hot (350 degrees). Place duck in wok and ladle hot oil on duck until completely golden brown, about 5 minutes total. Drain well. In a bowl, combine lotus, mushrooms, leeks, bacon and ginger. Stuff duck with mix and place on a tight fitting oval plate. Fill a wok with chicken stock and place a steaming rack inside that can accommodate the plate. Cover with lid and steam for 2 1/2 hours over medium heat. Remove plate. Turn the wok on high, add sauce ingredients and reduce stock, if necessary, to 1 cup. Whisk in the butter to finish the sauce and check for seasoning.
Plating: Nap the duck with the sauce and serve whole with a large serving spoon and fork. A knife will not be necessary.