There is a new secret menu now at Bangkok Golden in Falls Church, VA. There is the printed Thai menu, the printed Lao menu (which used to be the secret menu), and now a copied paper in a plastic sleeve with a list of new dishes. I had the kao soi form this list, which is a Chiang Mai version (with coconut milk) A wonderful soup with both soft and crunchy noodles plus on the side are raw onions, pickled vegetables and hot peppers.
Off menu, I had fermented pork belly (maybe it was a special of the day, they simply told me about it), and dried, pounded fish. Both dishes great, with the fish being completely stellar, served with raw and steamed vegetables to wrap with sticky rice.
This is a place where it really pays to make inquiries and let them guide you.