Personal baggage is now sniffed by dogs for agricultural quaranteen. If they alert on your bag you will be sent to secondary for inspection. Process is polite and professional and the items are whatever the dog found suspicious and the human inspector will make the final determination. In my case it was single unopened jar of Nutella. The customs agent OKed it and snapped a picture of it to send to the dog trainer. Man ahead of me had bread, another had what looked like some kind of meat.
Best bet if you don't like standing in lines is don't bring food.