No visit to Macau would be complete without a visit to Yee Shun Milk Dairy Company at Senado Square. One of their signature dishes is Double-Skin Steamed Milk. A traditional Cantonese dessert, the steamed milk is smooth with a very strong milk taste. The cooking process is quite interesting. A first milk "skin" is formed by letting boiling milk in a bowl to cool. The skin is then lifted and the milk poured into a mixture of egg white and sugar. The mixture is poured back into the bowl and steamed to form the second skin.
http://foodwink.blogspot.com/2010/05/8-hours-in-macau.html
