Rice

Rice is a grain product mostly eaten by humans.

In Smurfs Media
Probably the only place rice has been seen in mainstream Smurfs media is in the Season 9 episodes, where the timelost Smurfs visit China and Japan.

Empath: The Luckiest Smurf stories
Possibly because of either Grandpa Smurf's travels around the world or the Smurfs' own time-travel adventures during the period of The Lost Year, rice eventually became a regular food item in the EMPATH: The Luckiest Smurf story series. It is used in the creation of various types of foods, including desserts such as rice pudding.