For your information, in the United States, the situation that a half-eaten food comes out of the mouth is considered to be very bad manners, therefore, according to an extension of the idea that people should bring food to their mouths mouthful by mouthful, they cut them into small pieces on the plate and scoop by spoon.
ちなみにアメリカ合衆国では、口から食べかけの料理がはみ出している状態が大変な無作法と考えられており、料理は一口ずつ口に運ぶものだという考えの延長で、皿の上でどんな料理でも細かく切り刻みスプーンですくう。