I hate to be a total killjoy but...
its not the sauce, its the beef.
Usually the beef is marinated in a mixture of cornstarch, rice wine vinegar and oyster flavor sauce so it becomes very tender, very quickly.
A much better alternative, although more expensive, is the whole steamed fish. Usually steamed fish has just some shredded ginger and green onions tossed onto it to give it some flavor. It is delicious and if you ask they will stir fry some veggies for you in oil without additional sauce.
You can also try the peking duck, also more expensive, but you can take off the skin and it comes without sauce. The skin is usually coated with some kind of sugar sauce to help crisp it up and give it a lot of flavor
. But underneath that skin is delicious duck meat. They also give you stir fried shredded veggies, ask for no sauce on the them and avoid the plum sauce and pancakes.
If you live around the Alexandria area try the Peking Duck house on rt. 1 in the hybla valley. Great duck, very accomodating people and unfortunately for us, we moved from there a year ago.
Happy eating.
slowday