What are some common onion varieties used in cooking?
Common onions used in cooking are yellow onion, white onion, red onion, sweet onion, green onion, spring onion, leeks, and shallots.
### Instruction: What are some common onion varieties used in cooking?
### Context: 
### Answer: Common onions used in cooking are yellow onion, white onion, red onion, sweet onion, green onion, spring onion, leeks, and shallots.</s>