The Black Tavern, or Hei Dian, was a 1972 Shaw Brother movie directed by Wing-Cho Yip and the basic premise of the movie saw a beggar monk in a tavern telling all who will listen to his song about an allegedly corrupt official he saw on the road the night before carrying a king’s ransom in treasures.
Two brigands go after the official who is rescued by a hero. They arrive at the Black Tavern – a brigand’s place where steam buns made with human flesh are served – and it quickly becomes apparent that the “official” is another criminal out to get the real official and the hero is more than happy to work with him.
As the night progresses more and more villains appear.
|spitting bun in the corpse's face|
The imdb page is here.