What happened to the meal that the corpse demon gave Tang Priest?

Corpse demon is a character in The Journey to the West and one of the monsters living in Huaguoshan. In Journey to the West, the corpse demon offered a meal to the Tang Priest, but the meal was changed by the corpse demon, and nothing was explained!

The Journey to the West is a work of ancient myths and legends in China, which tells the story of four Taoist priests and a master and apprentice in the Tang Dynasty who learned Buddhist scriptures and practiced in the Western Heaven. There are many mythical elements in this work, such as monsters, immortals, fairy mountains and elixirs. It is a long-standing classic in China culture.