Oatmeal

Oatmeal is a breakfast cereal made from oats that is eaten by both humans and Smurfs.

Empath: The Luckiest Smurf stories
In the EMPATH: The Luckiest Smurf story series, oatmeal is made by Greedy Smurf as a breakfast item, served with various different flavorings. Most Smurfs think it is too similar to porridge and thus it isn't made often. Polaris Psyche does eat oatmeal on occasion, though he considers it a weak substitute to nutrient paste.