Beijing is the political, cultural and diplomatic centre of China. Cultures from all over the world as well as from all over China meet and merge together. "Beijing cuisine" derives its uniqueness from the blending of many food cultures including local cuisine, Islamic cuisine, royal cuisine, feudal official cuisine etc. Islamic cuisine which uses mainly beef and mutton has an important place in Beijing cuisine. Donglaishun's "Mutton Hotpot" has a long standing history and is loved by many for its special taste. The Peking Duck, named "China's Tastiest Dish", is made of grilled "stuff duck". The two varieties of Peking Duck are hang-grilled duck represented by those served at Quanjude Restaurant and stew-grilled duck represented by those served at Bianyifang Restaurant. As the capital city, Beijing not only gathers the finest food from all over China, but international cuisines from all over the world can be found here as well.
Source: http://www.hellomandarin.com