Free images results:

Onion pictures, stock photos and images


Crisps Royalty Free Stock Photo
Author: Minute
Onions Royalty Free Stock Photography
Author: Red2000
Onions Stock Image
Author: Suti
Mushrooms Stock Image
Author: Meg380
Harvest Royalty Free Stock Photos
Author: Akivi33
Harvest Royalty Free Stock Images
Author: Akivi33

Also, here are some commercial RF-licensed images that match your search criteria:  
Onion jam Stock Photography
Author: Wiktory