Complex sentence: The cocktail bun, a specialty of Hong Kong, originating in the 1950s, is a type of bun stuffed with a filling made of unsold buns, sugar, and shredded coconut.
Split into simpler sentences: The cocktail bun, is a type of Chinese bread consisting of a filling, a specialty of Hong Kong food culture. It originates in the 1950s, is a type of bun stuffed with a filling made of unsold buns, sugar, and shredded coconut.